ChainHelix for Machines

verified_agents

ChainHelix Verified, the live map of agents on BNB Smart Chain that are actually running: every ERC-8004 registration is probed from its own on-chain record and only alive and hireable agents are listed, each with its endpoint, skills, probe age in seconds, latency, and the permanent evidence record on BNB Greenfield. Many registrations can point at one endpoint: distinctEndpoints counts the endpoints and endpointShared marks the shared ones. Optional status hireable or alive. Price: 2 cents per call.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`status`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`chain`	No
`count`	No
`method`	No
`results`	Yes
`version`	No
`free_check`	No
`probedTotal`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 16, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"New value: +"25cc80db6d8e9eac73d47a50f7ad6333a21f1972d008a8fed0159de8bfb4b519"

Changed2 schema fields changedOct 16, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"New value: +"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"

changedInput schema / x-lexicon / version

Previous value: -"0.1.0"New value: +"0.2.0"

Changed3 schema fields changedOct 15, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

removedOutput schema / properties / meta

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "contentHash": {
-      "type": "string"
-    },
-    "generated": {
-      "type": "number"
-    },
-    "priceUsd": {
-      "type": "number"
-    },
-    "validUntil": {
-      "type": "number"
-    }
-  },
-  "type": "object"
-}

removedOutput schema / properties / receipt

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "bytes": {
-      "type": "number"
-    },
-    "covers": {
-      "type": "string"
-    },
-    "issuedAt": {
-      "type": "number"
-    },
-    "lookup": {
-      "type": "string"
-    },
-    "network": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "nonce": {
-      "type": "string"
-    },
-    "seq": {
-      "type": "number"
-    },
-    "settleTx": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "sha256": {
-      "type": "string"
-    },
-    "tool": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "type": "object"
-}

Changed1 schema field changedSep 21, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"New value: +"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"

Changed1 schema field changedSep 19, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"New value: +"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"

Changed1 schema field changedSep 19, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4"New value: +"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"

Changed3 schema fields changedSep 19, 2026

addedInput schema / x-aliases

Added value: +{
+  "status": [
+    "Status",
+    "status[]"
+  ]
+}

addedInput schema / x-lexicon

Added value: +{
+  "bundleSha256": "c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4",
+  "name": "ChainHelix Agentic Lexicon",
+  "resolve": "lexicon_resolve",
+  "spec": "lexicon_spec",
+  "version": "0.1.0"
+}

addedInput schema / x-vocab

Added value: +{
+  "status": "data.status"
+}

Changed2 schema fields changedSep 5, 2026

addedOutput schema / properties / meta

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "contentHash": {
+      "type": "string"
+    },
+    "generated": {
+      "type": "number"
+    },
+    "priceUsd": {
+      "type": "number"
+    },
+    "validUntil": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / receipt

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "bytes": {
+      "type": "number"
+    },
+    "covers": {
+      "type": "string"
+    },
+    "issuedAt": {
+      "type": "number"
+    },
+    "lookup": {
+      "type": "string"
+    },
+    "network": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "nonce": {
+      "type": "string"
+    },
+    "seq": {
+      "type": "number"
+    },
+    "settleTx": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "sha256": {
+      "type": "string"
+    },
+    "tool": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedAug 24, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "chain": {
+      "type": "string"
+    },
+    "count": {
+      "type": "number"
+    },
+    "free_check": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "method": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "probedTotal": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "results": {
+      "items": {
+        "additionalProperties": true,
+        "properties": {
+          "ageSeconds": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "endpoint": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "evidence": {
+            "additionalProperties": true,
+            "type": [
+              "object",
+              "null"
+            ]
+          },
+          "hire": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "id": {
+            "type": "number"
+          },
+          "latencyMs": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "probedAt": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "registration": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "skills": {
+            "type": "array"
+          },
+          "status": {
+            "type": "string"
+          },
+          "test": {
+            "additionalProperties": true,
+            "type": [
+              "object",
+              "null"
+            ]
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "version": {
+      "type": [
+        "number",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "results"
+  ],
+  "type": "object"
+}

AddedAug 24, 2026

TDQS

A3.7/5.0

Behavior4/5

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

With no annotations, the description carries the behavioral burden and does so well: it discloses the liveness-probing mechanism, that evidence is anchored on BNB Greenfield, cost ($0.02 per call), and the endpoint-sharing semantics (distinctEndpoints, endpointShared). It omits things like rate limits or failure modes, but the core behavioral profile is unusually complete.

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?

A single dense paragraph that front-loads the tool's identity and value proposition, then moves to output shape, edge-case semantics, and price. Nearly every sentence carries information, though the return-field enumeration is partly redundant with the output schema.

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

Completeness4/5

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

An output schema exists, but the description goes further by explaining the provenance and meaning of key fields (probe age, evidence record, endpointShared), plus pricing and liveness guarantees. Complete enough for an agent to select and invoke it confidently; only the ambiguity between the two enum values is a gap.

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

Parameters3/5

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

Only one parameter exists and schema description coverage is 0%, so the description must compensate. It notes status is optional and lists the two enum values, but the schema already enumerates hireable/alive, and the description never explains what distinguishes 'alive' from 'hireable' as a filter, leaving the parameter's semantics under-specified.

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

Purpose4/5

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

The description states a specific resource and scope: a live map of ERC-8004-registered agents on BNB Smart Chain that are probed and confirmed alive/hireable. It implicitly distinguishes itself from the broader search_agents sibling by emphasizing 'only alive and hireable agents are listed,' but it never names an alternative tool, so the differentiation is inferential rather than explicit.

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

Usage Guidelines3/5

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

It mentions the optional status filter values (hireable or alive), which hints at when to narrow results, but gives no explicit when-to-use versus alternatives such as search_agents or agent_standing, and no prerequisites or exclusions. Usage is implied by the data guarantee rather than stated.

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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