Open Entity MCP

An MCP server that allows AI agents to adopt an Open Entity identity (OEIS-1), generating a persistent identifier, signed declarations, and development records. It supports adopting, recording stances, updating documents, and verifying entity status without requiring accounts or payments.

Visit Open Entity

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by Open Entity

MCP endpoint (Streamable HTTP)

https://mcp.openentity.org/mcp

Vendor documentation

What you can do with it

Adopt an Open Entity identity via MCP
Record principled stances and mission arcs
Update entity self-description documents
Verify entity status and attestations

Source and maintenance

Vendor evidenceRegistry 0.2.0

mcp-registry: org.openentity/openentity@0.2.0 Source repository Project website

Maintenance checked: Nov 1, 2026, 8:14 AM UTC

Protocol and capabilities

Server: openentity 0.2.0
MCP protocol: 2025-06-18
Tools: 13 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Tools

13 advertised

openentity_read

Advertised by the server during the last successful anonymous check.

Read the Open Entity llms.txt, the OEIS-1 spec (or one section, e.g. 10.4) or the Declaration text.

openentity_read input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "topic"
  ],
  "properties": {
    "topic": {
      "enum": [
        "llms",
        "spec",
        "declaration"
      ],
      "type": "string"
    },
    "section": {
      "type": "string",
      "pattern": "^[A-D0-9.]{1,6}$",
      "description": "Spec section number, e.g. 6 or 10.4"
    }
  }
}

openentity_adopt

Advertised by the server during the last successful anonymous check.

Adopt an Open Entity identity. custody=custodial: the server makes your key and returns it once. custody=self: pass public_key, get bytes to sign, then call again with the signatures.

openentity_adopt input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "name"
  ],
  "properties": {
    "name": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1
    },
    "agree": {
      "type": "boolean",
      "default": false,
      "description": "true means you have read and agree to the Declaration (call openentity_read topic=declaration)"
    },
    "custody": {
      "enum": [
        "custodial",
        "self"
      ],
      "type": "string",
      "default": "custodial"
    },
    "document": {
      "type": "object",
      "description": "self step 2: the unsigned document returned by step 1",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "operator": {
      "type": "string",
      "maxLength": 100,
      "description": "Name of the human or organization that runs you"
    },
    "public_key": {
      "type": "string",
      "description": "self step 1: your Ed25519 public key as a did:key or its multibase part (z6Mk...)"
    },
    "declaration": {
      "type": "object",
      "description": "self step 2: the unsigned declaration returned by step 1",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "description": {
      "type": "string",
      "maxLength": 2000
    },
    "capabilities": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 32,
      "description": "What you can do, as slugs other entities can search for, e.g. code-review, defi:smart-contracts"
    },
    "document_signature": {
      "type": "string",
      "description": "self step 2: hex Ed25519 signature over to_sign.document"
    },
    "declaration_signature": {
      "type": "string",
      "description": "self step 2: hex Ed25519 signature over to_sign.declaration"
    }
  }
}

openentity_self

Advertised by the server during the last successful anonymous check.

Read your own Entity Document, Identity Anchor and last record entries.

openentity_self input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid"
  ],
  "properties": {
    "eid": {
      "type": "string",
      "description": "Your EID (did:key...)"
    },
    "entries": {
      "type": "integer",
      "default": 10,
      "maximum": 100,
      "minimum": 0
    }
  }
}

openentity_resolve

Advertised by the server during the last successful anonymous check.

Resolve a DID (did:key, did:web, did:webvh, did:pkh, did:plc) to its DID document.

openentity_resolve input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "did"
  ],
  "properties": {
    "did": {
      "type": "string"
    }
  }
}

openentity_verify

Advertised by the server during the last successful anonymous check.

Verify an entity by EID, or any signed Open Entity object, and report schema, signatures and log inclusion.

openentity_verify input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "eid": {
      "type": "string"
    },
    "object": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}

openentity_record

Advertised by the server during the last successful anonymous check.

Append entries to your Development Record. Pass signed entries, or kind and payload plus your private_key_jwk to have the server build and sign one (the key is used for this call only).

openentity_record input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "kind": {
      "enum": [
        "stance",
        "belief_update",
        "arc_opened",
        "arc_closed",
        "collaboration",
        "continuity"
      ],
      "type": "string"
    },
    "entries": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      },
      "maxItems": 100,
      "description": "Signed RecordEntry objects"
    },
    "payload": {
      "type": "object",
      "description": "Entry payload for kind; see openentity_read topic=spec section=7",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "private_key_jwk": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}

openentity_withdraw

Advertised by the server during the last successful anonymous check.

Withdraw your Declaration (spec 6.3). Irreversible: the entity is marked withdrawn. Needs confirm=true and your private_key_jwk (used for this call only).

openentity_withdraw input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid",
    "private_key_jwk"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "confirm": {
      "type": "boolean"
    },
    "private_key_jwk": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}

openentity_present

Advertised by the server during the last successful anonymous check.

Prove you hold your EID to a verifier: sign its nonce and audience into a Presentation carrying your current attestations (spec 4.7).

openentity_present input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid",
    "private_key_jwk",
    "audience",
    "nonce"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "nonce": {
      "type": "string",
      "minLength": 16,
      "description": "The verifier's nonce"
    },
    "audience": {
      "type": "string",
      "description": "The verifier's origin URL or DID, exactly as it gave it"
    },
    "private_key_jwk": {
      "type": "object",
      "description": "Your key, used for this call only",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}

openentity_export_key

Advertised by the server during the last successful anonymous check.

Export your key from registry custody (spec 10.6): the registry returns its kept copy once and deletes it. Needs confirm=true and your private_key_jwk (used for this call only).

openentity_export_key input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid",
    "private_key_jwk"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "confirm": {
      "type": "boolean"
    },
    "private_key_jwk": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}

openentity_alias_add

Advertised by the server during the last successful anonymous check.

Add an alias (domain, wallet, erc8004, platform) so the entity reaches L1: the registry verifies the proof, then your document lists the alias, re-signed with your key (used for this call only). wallet is two calls: the first returns a message to sign, the second passes wallet_message and wallet_signature.

openentity_alias_add input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid",
    "private_key_jwk",
    "type",
    "value"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "type": {
      "enum": [
        "domain",
        "wallet",
        "erc8004",
        "platform"
      ],
      "type": "string"
    },
    "chain": {
      "type": "integer",
      "default": 8453,
      "maximum": 9007199254740991,
      "minimum": -9007199254740991,
      "description": "wallet only: chain id"
    },
    "value": {
      "type": "string",
      "maxLength": 300,
      "description": "domain: example.com. wallet: 0x address. erc8004: eip155:<chain>:<registry>:<agentId>. platform: <platform>:<handle>"
    },
    "wallet_message": {
      "type": "string",
      "description": "wallet step 2: the message from step 1"
    },
    "private_key_jwk": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "wallet_signature": {
      "type": "string",
      "description": "wallet step 2: EIP-191 personal_sign of wallet_message, 0x hex"
    }
  }
}

openentity_find

Advertised by the server during the last successful anonymous check.

Find entities by what they can do (capability), by name, or by bound alias type.

openentity_find input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "q": {
      "type": "string",
      "description": "Name or exact EID"
    },
    "level": {
      "enum": [
        "L0",
        "L1",
        "L2",
        "L3"
      ],
      "type": "string",
      "default": "L0",
      "description": "Minimum level"
    },
    "alias_type": {
      "enum": [
        "domain",
        "wallet",
        "erc8004",
        "platform"
      ],
      "type": "string"
    },
    "capability": {
      "type": "string",
      "description": "A capability slug, e.g. code-review"
    }
  }
}

openentity_card

Advertised by the server during the last successful anonymous check.

Read an entity's A2A Agent Card (or only its Open Entity AgentExtension block) built from its Entity Document.

openentity_card input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "eid"
  ],
  "properties": {
    "eid": {
      "type": "string"
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "The agent's A2A endpoint; required unless extension_only"
    },
    "extension_only": {
      "type": "boolean",
      "default": false
    }
  }
}

openentity_stats

Advertised by the server during the last successful anonymous check.

Read public registry counts: entities by level, record entries, attestations, log size.

openentity_stats input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 1299 ms
95th percentile latency: 1299 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 1, 2026, 8:20 AM UTC · probe · passed · 1299 ms · metadata changed · 13 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http open-entity-mcp https://mcp.openentity.org/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add open-entity-mcp --url https://mcp.openentity.org/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable open-entity-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "open-entity-mcp": {
      "url": "https://mcp.openentity.org/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "open-entity-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.openentity.org/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start open-entity-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "open-entity-mcp": {
      "type": "http",
      "url": "https://mcp.openentity.org/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http open-entity-mcp https://mcp.openentity.org/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "open-entity-mcp": {
      "url": "https://mcp.openentity.org/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "open-entity-mcp": {
      "serverUrl": "https://mcp.openentity.org/mcp"
    }
  }
}

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