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BlockVectra: multi-chain RPC & Data API

by com.blockvectra
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Estimate Usage and Cost

estimate_usage
Read-only

Calculate projected daily and billing cycle Compute Units (CU) and USD costs for planned call volumes across one or more methods, factoring in method weights and free credit allowances from /v1/plans. Available without an API key. Estimates the API key count for planned traffic under the free-account key_defaults (free new-key default CU/s); the result also echoes paid_key_minimums (the paid-account floor, not a cap: the first paid top-up raises each key to at least this value and higher custom limits are kept, and a key's actual limits come from the console Keys list). Cost and quota assumptions are for free-tier accounts. Use this tool for volume budget calculations and capacity planning. For looking up raw system pricing tables, use get_pricing instead. For checking whether a single method is supported on a specific chain, use get_method_info instead. Accepts 'lines' array of {method, calls_per_day} or single 'method' and 'calls_per_day'.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
linesNoList of methods and daily call volumes to estimate.
methodNoExact method name (e.g. 'eth_call', 'eth_getLogs', 'eth_blockNumber', 'data.address_balances'). Single-method mode.
calls_per_dayNoExpected daily call volume (non-negative integer). Single-method mode.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "allOf": [
-      {
-        "anyOf": [
-          {
-            "required": [
-              "method",
-              "calls_per_day"
-            ]
-          },
-          {
-            "not": {
-              "anyOf": [
-                {
-                  "required": [
-                    "method"
-                  ]
-                },
-                {
-                  "required": [
-                    "calls_per_day"
-                  ]
-                },
-                {
-                  "required": [
-                    "cu_weight"
-                  ]
-                }
-              ]
-            },
-            "properties": {
-              "lines": {
-                "minItems": 2,
-                "type": "array"
-              }
-            },
-            "required": [
-              "lines",
-              "daily_cu",
-              "daily_cost_usd",
-              "cycle_days",
-              "cycle_cu",
-              "cycle_cost_usd"
-            ]
-          }
-        ],
-        "properties": {
-          "average_calls_per_sec": {
-            "type": "number"
-          },
-          "calls_per_day": {
-            "type": "number"
-          },
-          "cu_weight": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "cycle_cost_usd": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "cycle_cu": {
-            "type": "number"
-          },
-          "cycle_days": {
-            "type": "number"
-          },
-          "daily_cost_usd": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "daily_cu": {
-            "type": "number"
-          },
-          "exceeds_free_quota": {
-            "type": "boolean"
-          },
-          "exceeds_rate_limit": {
-            "type": "boolean"
-          },
-          "free_quota_cu": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "lines": {
-            "items": {
-              "properties": {
-                "calls_per_day": {
-                  "type": "number"
-                },
-                "cu_weight": {
-                  "type": "number"
-                },
-                "daily_cost_usd": {
-                  "type": [
-                    "number",
-                    "null"
-                  ]
-                },
-                "daily_cu": {
-                  "type": "number"
-                },
-                "method": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "method",
-                "calls_per_day",
-                "cu_weight",
-                "daily_cu",
-                "daily_cost_usd"
-              ],
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "max_calls_per_sec": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "method": {
-            "type": "string"
-          },
-          "quota_percent": {
-            "type": [
-              "number",
-              "null"
-            ]
-          }
-        },
-        "type": "object"
-      },
-      {
-        "not": {
-          "properties": {
-            "error": {
-              "const": "invalid_tool_arguments",
-              "type": "string"
-            }
-          },
-          "required": [
-            "error"
-          ],
-          "type": "object"
-        }
-      }
-    ]
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "error": {
-        "const": "invalid_tool_arguments",
-        "type": "string"
-      },
-      "message": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "enum": [
-          "invalid_root",
-          "schema_type",
-          "schema_enum",
-          "undeclared_property",
-          "credential_field",
-          "credential_value"
-        ],
-        "type": "string"
-      }
-    },
-    "required": [
-      "error",
-      "reason",
-      "message"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "allOf": [
+      {
+        "anyOf": [
+          {
+            "allOf": [
+              {
+                "anyOf": [
+                  {
+                    "required": [
+                      "method",
+                      "calls_per_day"
+                    ]
+                  },
+                  {
+                    "not": {
+                      "anyOf": [
+                        {
+                          "required": [
+                            "method"
+                          ]
+                        },
+                        {
+                          "required": [
+                            "calls_per_day"
+                          ]
+                        },
+                        {
+                          "required": [
+                            "cu_weight"
+                          ]
+                        }
+                      ]
+                    },
+                    "properties": {
+                      "lines": {
+                        "minItems": 2,
+                        "type": "array"
+                      }
+                    },
+                    "required": [
+                      "lines",
+                      "daily_cu",
+                      "daily_cost_usd",
+                      "cycle_days",
+                      "cycle_cu",
+                      "cycle_cost_usd"
+                    ]
+                  }
+                ],
+                "properties": {
+                  "average_calls_per_sec": {
+                    "type": "number"
+                  },
+                  "calls_per_day": {
+                    "type": "number"
+                  },
+                  "cu_weight": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "cycle_cost_usd": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "cycle_cu": {
+                    "type": "number"
+                  },
+                  "cycle_days": {
+                    "type": "number"
+                  },
+                  "daily_cost_usd": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "daily_cu": {
+                    "type": "number"
+                  },
+                  "exceeds_free_quota": {
+                    "type": "boolean"
+                  },
+                  "exceeds_rate_limit": {
+                    "type": "boolean"
+                  },
+                  "free_quota_cu": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "lines": {
+                    "items": {
+                      "properties": {
+                        "calls_per_day": {
+                          "type": "number"
+                        },
+                        "cu_weight": {
+                          "type": "number"
+                        },
+                        "daily_cost_usd": {
+                          "type": [
+                            "number",
+                            "null"
+                          ]
+                        },
+                        "daily_cu": {
+                          "type": "number"
+                        },
+                        "method": {
+                          "type": "string"
+                        }
+                      },
+                      "required": [
+                        "method",
+                        "calls_per_day",
+                        "cu_weight",
+                        "daily_cu",
+                        "daily_cost_usd"
+                      ],
+                      "type": "object"
+                    },
+                    "type": "array"
+                  },
+                  "max_calls_per_sec": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  },
+                  "method": {
+                    "type": "string"
+                  },
+                  "quota_percent": {
+                    "type": [
+                      "number",
+                      "null"
+                    ]
+                  }
+                },
+                "type": "object"
+              },
+              {
+                "not": {
+                  "properties": {
+                    "error": {
+                      "const": "executor_request_rejected",
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "error"
+                  ],
+                  "type": "object"
+                }
+              }
+            ]
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "error": {
+                "const": "executor_request_rejected",
+                "type": "string"
+              },
+              "message": {
+                "minLength": 1,
+                "type": "string"
+              },
+              "reason": {
+                "enum": [
+                  "method_required",
+                  "calls_per_day_invalid"
+                ],
+                "type": "string"
+              }
+            },
+            "required": [
+              "error",
+              "reason",
+              "message"
+            ],
+            "type": "object"
+          }
+        ],
+        "type": "object"
+      },
+      {
+        "not": {
+          "properties": {
+            "error": {
+              "const": "invalid_tool_arguments",
+              "type": "string"
+            }
+          },
+          "required": [
+            "error"
+          ],
+          "type": "object"
+        }
+      }
+    ]
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "const": "invalid_tool_arguments",
+        "type": "string"
+      },
+      "message": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "enum": [
+          "invalid_root",
+          "schema_type",
+          "schema_enum",
+          "undeclared_property",
+          "credential_field",
+          "credential_value"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "error",
+      "reason",
+      "message"
+    ],
+    "type": "object"
+  }
+]
  2. Changed1 schema field changed
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "allOf": [
-      {
-        "properties": {
-          "average_calls_per_sec": {
-            "type": "number"
-          },
-          "calls_per_day": {
-            "type": "number"
-          },
-          "cu_weight": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "cycle_cost_usd": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "cycle_cu": {
-            "type": "number"
-          },
-          "cycle_days": {
-            "type": "number"
-          },
-          "daily_cost_usd": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "daily_cu": {
-            "type": "number"
-          },
-          "exceeds_free_quota": {
-            "type": "boolean"
-          },
-          "exceeds_rate_limit": {
-            "type": "boolean"
-          },
-          "free_quota_cu": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "max_calls_per_sec": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "method": {
-            "type": "string"
-          },
-          "quota_percent": {
-            "type": [
-              "number",
-              "null"
-            ]
-          }
-        },
-        "required": [
-          "method",
-          "calls_per_day"
-        ],
-        "type": "object"
-      },
-      {
-        "not": {
-          "properties": {
-            "error": {
-              "const": "invalid_tool_arguments",
-              "type": "string"
-            }
-          },
-          "required": [
-            "error"
-          ],
-          "type": "object"
-        }
-      }
-    ]
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "error": {
-        "const": "invalid_tool_arguments",
-        "type": "string"
-      },
-      "message": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "enum": [
-          "invalid_root",
-          "schema_type",
-          "schema_enum",
-          "undeclared_property",
-          "credential_field",
-          "credential_value"
-        ],
-        "type": "string"
-      }
-    },
-    "required": [
-      "error",
-      "reason",
-      "message"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "allOf": [
+      {
+        "anyOf": [
+          {
+            "required": [
+              "method",
+              "calls_per_day"
+            ]
+          },
+          {
+            "not": {
+              "anyOf": [
+                {
+                  "required": [
+                    "method"
+                  ]
+                },
+                {
+                  "required": [
+                    "calls_per_day"
+                  ]
+                },
+                {
+                  "required": [
+                    "cu_weight"
+                  ]
+                }
+              ]
+            },
+            "properties": {
+              "lines": {
+                "minItems": 2,
+                "type": "array"
+              }
+            },
+            "required": [
+              "lines",
+              "daily_cu",
+              "daily_cost_usd",
+              "cycle_days",
+              "cycle_cu",
+              "cycle_cost_usd"
+            ]
+          }
+        ],
+        "properties": {
+          "average_calls_per_sec": {
+            "type": "number"
+          },
+          "calls_per_day": {
+            "type": "number"
+          },
+          "cu_weight": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "cycle_cost_usd": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "cycle_cu": {
+            "type": "number"
+          },
+          "cycle_days": {
+            "type": "number"
+          },
+          "daily_cost_usd": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "daily_cu": {
+            "type": "number"
+          },
+          "exceeds_free_quota": {
+            "type": "boolean"
+          },
+          "exceeds_rate_limit": {
+            "type": "boolean"
+          },
+          "free_quota_cu": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "lines": {
+            "items": {
+              "properties": {
+                "calls_per_day": {
+                  "type": "number"
+                },
+                "cu_weight": {
+                  "type": "number"
+                },
+                "daily_cost_usd": {
+                  "type": [
+                    "number",
+                    "null"
+                  ]
+                },
+                "daily_cu": {
+                  "type": "number"
+                },
+                "method": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "method",
+                "calls_per_day",
+                "cu_weight",
+                "daily_cu",
+                "daily_cost_usd"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "max_calls_per_sec": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "method": {
+            "type": "string"
+          },
+          "quota_percent": {
+            "type": [
+              "number",
+              "null"
+            ]
+          }
+        },
+        "type": "object"
+      },
+      {
+        "not": {
+          "properties": {
+            "error": {
+              "const": "invalid_tool_arguments",
+              "type": "string"
+            }
+          },
+          "required": [
+            "error"
+          ],
+          "type": "object"
+        }
+      }
+    ]
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "const": "invalid_tool_arguments",
+        "type": "string"
+      },
+      "message": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "enum": [
+          "invalid_root",
+          "schema_type",
+          "schema_enum",
+          "undeclared_property",
+          "credential_field",
+          "credential_value"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "error",
+      "reason",
+      "message"
+    ],
+    "type": "object"
+  }
+]
  3. Changed3 schema fields changed
    • addedOutput schema / anyOf
      Added value: +[
+  {
+    "allOf": [
+      {
+        "properties": {
+          "average_calls_per_sec": {
+            "type": "number"
+          },
+          "calls_per_day": {
+            "type": "number"
+          },
+          "cu_weight": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "cycle_cost_usd": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "cycle_cu": {
+            "type": "number"
+          },
+          "cycle_days": {
+            "type": "number"
+          },
+          "daily_cost_usd": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "daily_cu": {
+            "type": "number"
+          },
+          "exceeds_free_quota": {
+            "type": "boolean"
+          },
+          "exceeds_rate_limit": {
+            "type": "boolean"
+          },
+          "free_quota_cu": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "max_calls_per_sec": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "method": {
+            "type": "string"
+          },
+          "quota_percent": {
+            "type": [
+              "number",
+              "null"
+            ]
+          }
+        },
+        "required": [
+          "method",
+          "calls_per_day"
+        ],
+        "type": "object"
+      },
+      {
+        "not": {
+          "properties": {
+            "error": {
+              "const": "invalid_tool_arguments",
+              "type": "string"
+            }
+          },
+          "required": [
+            "error"
+          ],
+          "type": "object"
+        }
+      }
+    ]
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "const": "invalid_tool_arguments",
+        "type": "string"
+      },
+      "message": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "enum": [
+          "invalid_root",
+          "schema_type",
+          "schema_enum",
+          "undeclared_property",
+          "credential_field",
+          "credential_value"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "error",
+      "reason",
+      "message"
+    ],
+    "type": "object"
+  }
+]
    • removedOutput schema / properties
      Removed value: -{
-  "average_calls_per_sec": {
-    "type": "number"
-  },
-  "calls_per_day": {
-    "type": "number"
-  },
-  "cu_weight": {
-    "type": [
-      "number",
-      "null"
-    ]
-  },
-  "cycle_cost_usd": {
-    "type": [
-      "number",
-      "null"
-    ]
-  },
-  "cycle_cu": {
-    "type": "number"
-  },
-  "cycle_days": {
-    "type": "number"
-  },
-  "daily_cost_usd": {
-    "type": [
-      "number",
-      "null"
-    ]
-  },
-  "daily_cu": {
-    "type": "number"
-  },
-  "exceeds_free_quota": {
-    "type": "boolean"
-  },
-  "exceeds_rate_limit": {
-    "type": "boolean"
-  },
-  "free_quota_cu": {
-    "type": [
-      "number",
-      "null"
-    ]
-  },
-  "max_calls_per_sec": {
-    "type": [
-      "number",
-      "null"
-    ]
-  },
-  "method": {
-    "type": "string"
-  },
-  "quota_percent": {
-    "type": [
-      "number",
-      "null"
-    ]
-  }
-}
    • removedOutput schema / required
      Removed value: -[
-  "method",
-  "calls_per_day"
-]
  4. Changed2 schema fields changed
    • changedInput schema / properties / calls_per_day / description
      Previous value: -"Expected daily call volume (non-negative integer). Legacy single-method mode."New value: +"Expected daily call volume (non-negative integer). Single-method mode."
    • changedInput schema / properties / method / description
      Previous value: -"Exact method name (e.g. 'eth_call', 'eth_getLogs', 'eth_blockNumber', 'data.address_balances'). Legacy single-method mode."New value: +"Exact method name (e.g. 'eth_call', 'eth_getLogs', 'eth_blockNumber', 'data.address_balances'). Single-method mode."
  5. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "average_calls_per_sec": {
+      "type": "number"
+    },
+    "calls_per_day": {
+      "type": "number"
+    },
+    "cu_weight": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "cycle_cost_usd": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "cycle_cu": {
+      "type": "number"
+    },
+    "cycle_days": {
+      "type": "number"
+    },
+    "daily_cost_usd": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "daily_cu": {
+      "type": "number"
+    },
+    "exceeds_free_quota": {
+      "type": "boolean"
+    },
+    "exceeds_rate_limit": {
+      "type": "boolean"
+    },
+    "free_quota_cu": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "max_calls_per_sec": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "method": {
+      "type": "string"
+    },
+    "quota_percent": {
+      "type": [
+        "number",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "method",
+    "calls_per_day"
+  ],
+  "type": "object"
+}
  6. First observed

TDQS

A4.8/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only cover safety (readOnly, not open-world); the description goes well beyond them, disclosing that no API key is needed, that cost/quota assumptions are free-tier only, and clarifying that paid_key_minimums is a floor rather than a cap with limits authoritatively coming from the console.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Purpose is front-loaded and every sentence carries information, though the long parenthetical about paid_key_minimums semantics is dense and slightly interrupts flow. Still no filler or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given an output schema exists, return formatting need not be described; the description still covers the key semantic caveats (free-tier assumption, paid_key_minimums being a floor) and both input modes, leaving nothing material for correct invocation missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so 3 is the baseline, but the description adds the invocation-level distinction that 'lines' and the single method/calls_per_day form are mutually alternative modes and that single calls_per_day feeds the free-account key_defaults estimate, which the schema alone does not make explicit.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource: calculate projected daily/billing-cycle Compute Units and USD costs for planned call volumes. It also names the sibling tools it is not (get_pricing, get_method_info), so an agent can route without opening other schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly frames the use case ('volume budget calculations and capacity planning') and gives two concrete alternatives with their selecting conditions: get_pricing for raw system pricing tables, get_method_info for per-chain method support.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All BlockVectra: multi-chain RPC & Data API toolsInspect
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