SQD

by io.github.subsquid-labs

Overview Discussions Admin

Find blockchain networks

portal_list_networks

Read-only

Find the right network or chain name to use across EVM, Solana, Bitcoin, Substrate, and Hyperliquid.

COMMON USER ASKS:

Find Base-like networks
Show Solana mainnets
Show Substrate mainnets

FIRST CHOICE FOR:

finding the correct network before any other query

WHEN TO USE:

You are not sure which network name, chain name, or alias to use.
You want to filter networks by VM family, network type, or real-time availability.

DON'T USE:

You already know the exact network and want live data from that network.

EXAMPLES:

Find Base-like networks: {"query":"base","limit":10}
Show Solana mainnets: {"vm":"solana","network_type":"mainnet"}
Show Substrate mainnets: {"vm":"substrate","network_type":"mainnet"}

Input Schema

TableJSON Schema

Name	Required	Description
`vm`	No	Filter by VM family
`limit`	No	Max results to return (default: 25, max: 100)
`query`	No	Search by name, alias, or chain ID
`cursor`	No	Continuation cursor from a previous network catalog page
`network_type`	No	Filter by network type
`real_time_only`	No	Only show networks with a real-time indexed head

Output Schema

TableJSON Schema

Name	Required	Description
`_ui`	No	Chart, table, and follow-up presentation metadata.
`_app`	No	SQD Explorer identity and host-render state.
`_llm`	No	Hints to locate the primary evidence.
`_meta`	No	Network, block range, timing, and row counts.
`error`	No	Structured failure details.
`items`	No	Primary rows for list results.
`value`	No	Primary scalar result.
`answer`	No	Answer grounded in the returned data.
`_notice`	No	Limitation or truncation notice.
`_server`	No	SQD server name, exact version, and git commit.
`display`	No	Labels for presenting the result.
`_notices`	No	Limitation or truncation notices.
`_summary`	No	Human-readable summary.
`_coverage`	No	Window and result completeness.
`_evidence`	No	Replayable arguments, digest, row count, and receipt.
`_ordering`	No	Ordering guarantees.
`_execution`	No	Bounded execution and scan details.
`_freshness`	No	Freshness and finality.
`next_steps`	No	Safe follow-up actions and continuation guidance.
`_pagination`	No	Pagination state and next_cursor.
`investigation`	No	Evidence paths, pivots, and limitations.
`pipes_handoff`	No	SQD Pipes guidance for custom data needs.
`_tool_contract`	No	Tool identity, intent, and chain families.

Schema Changelog

Changes observed during successful MCP inspections.

Changed51 schema fields changedSep 7, 2026

removedOutput schema / properties / _app / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / _app / description

Previous value: -"SQD Explorer identity and honest host-render state."New value: +"SQD Explorer identity and host-render state."

removedOutput schema / properties / _app / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _app / type
```
Removed value: -"object"
```

changedOutput schema / properties / _coverage / description

Previous value: -"Completeness of the requested window and result set."New value: +"Window and result completeness."

removedOutput schema / properties / _evidence / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / _evidence / description

Previous value: -"Replayable arguments, exact-data digest, row count, and completeness receipt."New value: +"Replayable arguments, digest, row count, and receipt."

removedOutput schema / properties / _evidence / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _evidence / type
```
Removed value: -"object"
```
removedOutput schema / properties / _execution / additionalProperties
```
Removed value: -{}
```
removedOutput schema / properties / _execution / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _execution / type
```
Removed value: -"object"
```

changedOutput schema / properties / _freshness / description

Previous value: -"Freshness and finality information for the returned data."New value: +"Freshness and finality."

changedOutput schema / properties / _llm / description

Previous value: -"Hints that help an AI client locate the primary evidence."New value: +"Hints to locate the primary evidence."

removedOutput schema / properties / _meta / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / _meta / description

Previous value: -"Network, block range, timing, and row-count metadata."New value: +"Network, block range, timing, and row counts."

removedOutput schema / properties / _meta / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _meta / type
```
Removed value: -"object"
```

changedOutput schema / properties / _notice / description

Previous value: -"Important limitation or truncation notice."New value: +"Limitation or truncation notice."

changedOutput schema / properties / _notices / description

Previous value: -"Important limitations or truncation notices."New value: +"Limitation or truncation notices."

changedOutput schema / properties / _ordering / description

Previous value: -"Ordering guarantees for the returned data."New value: +"Ordering guarantees."

removedOutput schema / properties / _pagination / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / _pagination / description

Previous value: -"Pagination state and an optional continuation cursor."New value: +"Pagination state and next_cursor."

removedOutput schema / properties / _pagination / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _pagination / type
```
Removed value: -"object"
```

changedOutput schema / properties / _server / description

Previous value: -"Observable SQD server identity and exact release version."New value: +"SQD server name, exact version, and git commit."

addedOutput schema / properties / _server / properties / commit
```
Added value: +{
+  "type": "string"
+}
```

changedOutput schema / properties / _server / required

Previous value: -[
-  "name",
-  "version"
-]New value: +[
+  "name",
+  "version",
+  "commit"
+]

changedOutput schema / properties / _summary / description

Previous value: -"Human-readable summary of the result."New value: +"Human-readable summary."

removedOutput schema / properties / _tool_contract / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / _tool_contract / description

Previous value: -"Tool identity, intent, and supported blockchain families."New value: +"Tool identity, intent, and chain families."

removedOutput schema / properties / _tool_contract / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / _tool_contract / type
```
Removed value: -"object"
```

changedOutput schema / properties / _ui / description

Previous value: -"Optional chart, table, and follow-up presentation metadata."New value: +"Chart, table, and follow-up presentation metadata."

changedOutput schema / properties / answer / description

Previous value: -"Concise answer grounded in the returned blockchain data."New value: +"Answer grounded in the returned data."

removedOutput schema / properties / display / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / display / description

Previous value: -"Plain-language labels for presenting the result."New value: +"Labels for presenting the result."

removedOutput schema / properties / display / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / display / type
```
Removed value: -"object"
```

changedOutput schema / properties / error / description

Previous value: -"Structured failure details when the tool cannot complete the request."New value: +"Structured failure details."

removedOutput schema / properties / investigation / additionalProperties
```
Removed value: -{}
```

changedOutput schema / properties / investigation / description

Previous value: -"Evidence paths, useful pivots, and result limitations."New value: +"Evidence paths, pivots, and limitations."

removedOutput schema / properties / investigation / propertyNames
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / investigation / type
```
Removed value: -"object"
```

changedOutput schema / properties / items / description

Previous value: -"Primary result rows when the tool returns a list."New value: +"Primary rows for list results."

removedOutput schema / properties / next_steps / additionalProperties
```
Removed value: -{}
```

removedOutput schema / properties / next_steps / properties

Removed value: -{
-  "actions": {
-    "items": {
-      "additionalProperties": {},
-      "propertyNames": {
-        "type": "string"
-      },
-      "type": "object"
-    },
-    "type": "array"
-  },
-  "continuation": {
-    "additionalProperties": {},
-    "propertyNames": {
-      "type": "string"
-    },
-    "type": "object"
-  },
-  "custom_data": {
-    "additionalProperties": {},
-    "propertyNames": {
-      "type": "string"
-    },
-    "type": "object"
-  }
-}

removedOutput schema / properties / next_steps / required
```
Removed value: -[
-  "actions"
-]
```
removedOutput schema / properties / next_steps / type
```
Removed value: -"object"
```

changedOutput schema / properties / pipes_handoff / description

Previous value: -"Optional SQD Pipes guidance for custom data needs."New value: +"SQD Pipes guidance for custom data needs."

changedOutput schema / properties / value / description

Previous value: -"Primary result when the tool returns a scalar value."New value: +"Primary scalar result."

Changed2 schema fields changedSep 1, 2026

changedOutput schema / properties / _app / description

Previous value: -"SQD Blockchain Activity Explorer identity and honest host-render state."New value: +"SQD Explorer identity and honest host-render state."

addedOutput schema / properties / _server

Added value: +{
+  "additionalProperties": false,
+  "description": "Observable SQD server identity and exact release version.",
+  "properties": {
+    "name": {
+      "type": "string"
+    },
+    "version": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "name",
+    "version"
+  ],
+  "type": "object"
+}

Changed1 schema field changedAug 31, 2026

addedOutput schema / properties / _app

Added value: +{
+  "additionalProperties": {},
+  "description": "SQD Blockchain Activity Explorer identity and honest host-render state.",
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}

Changed1 schema field changedAug 30, 2026

addedOutput schema / properties / _evidence

Added value: +{
+  "additionalProperties": {},
+  "description": "Replayable arguments, exact-data digest, row count, and completeness receipt.",
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}

Changed1 schema field changedAug 28, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": {},
+  "properties": {
+    "_coverage": {
+      "description": "Completeness of the requested window and result set."
+    },
+    "_execution": {
+      "additionalProperties": {},
+      "description": "Bounded execution and scan details.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "_freshness": {
+      "description": "Freshness and finality information for the returned data."
+    },
+    "_llm": {
+      "description": "Hints that help an AI client locate the primary evidence."
+    },
+    "_meta": {
+      "additionalProperties": {},
+      "description": "Network, block range, timing, and row-count metadata.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "_notice": {
+      "description": "Important limitation or truncation notice.",
+      "type": "string"
+    },
+    "_notices": {
+      "description": "Important limitations or truncation notices.",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "_ordering": {
+      "description": "Ordering guarantees for the returned data."
+    },
+    "_pagination": {
+      "additionalProperties": {},
+      "description": "Pagination state and an optional continuation cursor.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "_summary": {
+      "description": "Human-readable summary of the result.",
+      "type": "string"
+    },
+    "_tool_contract": {
+      "additionalProperties": {},
+      "description": "Tool identity, intent, and supported blockchain families.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "_ui": {
+      "description": "Optional chart, table, and follow-up presentation metadata."
+    },
+    "answer": {
+      "description": "Concise answer grounded in the returned blockchain data.",
+      "type": "string"
+    },
+    "display": {
+      "additionalProperties": {},
+      "description": "Plain-language labels for presenting the result.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "error": {
+      "additionalProperties": {},
+      "description": "Structured failure details when the tool cannot complete the request.",
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "origin": {
+          "type": "string"
+        },
+        "retry_after_ms": {
+          "type": "number"
+        },
+        "retryable": {
+          "type": "boolean"
+        },
+        "suggestions": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "summary": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "code",
+        "origin",
+        "summary",
+        "retryable",
+        "suggestions"
+      ],
+      "type": "object"
+    },
+    "investigation": {
+      "additionalProperties": {},
+      "description": "Evidence paths, useful pivots, and result limitations.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "items": {
+      "description": "Primary result rows when the tool returns a list.",
+      "items": {},
+      "type": "array"
+    },
+    "next_steps": {
+      "additionalProperties": {},
+      "description": "Safe follow-up actions and continuation guidance.",
+      "properties": {
+        "actions": {
+          "items": {
+            "additionalProperties": {},
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "continuation": {
+          "additionalProperties": {},
+          "propertyNames": {
+            "type": "string"
+          },
+          "type": "object"
+        },
+        "custom_data": {
+          "additionalProperties": {},
+          "propertyNames": {
+            "type": "string"
+          },
+          "type": "object"
+        }
+      },
+      "required": [
+        "actions"
+      ],
+      "type": "object"
+    },
+    "pipes_handoff": {
+      "description": "Optional SQD Pipes guidance for custom data needs."
+    },
+    "value": {
+      "description": "Primary result when the tool returns a scalar value."
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedAug 28, 2026

addedInput schema / properties / cursor

Added value: +{
+  "description": "Continuation cursor from a previous network catalog page",
+  "type": "string"
+}

Changed3 schema fields changedAug 27, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

removedInput schema / additionalProperties
```
Removed value: -false
```

changedInput schema / properties / vm / enum

Previous value: -[
-  "evm",
-  "solana",
-  "bitcoin",
-  "substrate",
-  "hyperliquid"
-]New value: +[
+  "evm",
+  "tron",
+  "solana",
+  "bitcoin",
+  "substrate",
+  "hyperliquid"
+]

First observedJun 27, 2026

TDQS

A4.7/5.0

Behavior4/5

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

The annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, establishing this as a safe read-only lookup. The description adds useful behavioral context by clarifying it is a catalog/discovery tool, not a live-data query, and by framing its role as the first step before other queries. No contradictions exist.

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

Conciseness5/5

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

The description is well structured with scannable sections: purpose, common asks, first choice, when/don't use, and examples. Each section is purposeful and the examples are directly actionable, making the length justified.

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?

For a discovery tool with 6 optional parameters, no required parameters, and an output schema, the description fully covers when, why, and how to use it. The output schema handles return-value details, and the examples plus exclusion guidance complete the context.

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 description coverage is 100%, so the parameters are already documented. The description adds value by mapping common user asks to concrete parameter combinations (e.g., 'Show Solana mainnets' → vm+network_type) and providing example JSON payloads, which helps the agent construct correct calls.

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?

The description states a specific verb and resource: finding the right network or chain name across EVM, Solana, Bitcoin, Substrate, and Hyperliquid. It clearly differentiates this discovery tool from the sibling analytics and query tools, which assume the network is already known.

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?

The description includes explicit 'FIRST CHOICE FOR', 'WHEN TO USE', and 'DON'T USE' sections, giving clear conditions for invocation and an explicit exclusion case. It names the alternative pattern (querying live data directly) and tells the agent when not to use this tool.

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

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