@lemmaoracle/mcp

endpoint

https://mcp.lemma.workers.dev/mcp

protocol

http-sse ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is @lemmaoracle/mcp live?

Yes — it answered the hub's last check (checked 1h ago). It answered 98% of checks over the last 30 days.

Is @lemmaoracle/mcp free to use?

Yes — the hub reached it with no key and no payment.

What tools does @lemmaoracle/mcp have?

5 tools: lemma_get_proof_status, lemma_get_schema, lemma_query_verified_attributes, lemma_get_circuit, lemma_get_generator.

Is @lemmaoracle/mcp safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• lemma_get_proof_status reads unknown 5h ago

  Get the verification status of a proof. NOTE: the v2 API does not yet expose a dedicated GET /v1/proofs/{id} endpoint, so this tool internally calls POST /v1/verified-attributes/query filtered by docHash (treating the verificationId returned from lemma_submit_proof as a docHash filter). Returns { status, circuitId, chainId, docHash } extracted from the matched item, or undefined if the verificationId is unknown. Status enum: received | verified | onchain-verified | rejected. Use the SDK's isVerified() helper (or check status === 'verified' || status === 'onchain-verified') to determine cryptographic validity.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "verificationId"
    ],
    "properties": {
      "verificationId": {
        "type": "string",
        "description": "verificationId returned by lemma_submit_proof. Internally treated as a docHash filter on POST /v1/verified-attributes/query (no dedicated GET /v1/proofs/{id} endpoint in v2 API)."
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy
• lemma_get_schema reads unknown 5h ago

  Retrieve a Lemma schema by its ID via GET /v1/schemas/{id}. A schema declares how documents of a given type are interpreted and normalized. Returns SchemaMeta { id, description? } with additionalProperties open — implementations commonly include a `normalize` artifact (WASM that maps raw documents to canonical form) and its content hash. Use this when you need to interpret attribute keys returned by lemma_query_verified_attributes.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "id"
    ],
    "properties": {
      "id": {
        "type": "string",
        "description": "Schema ID. Returned in the `schema` field of VerifiedAttributesQueryResponseItem from lemma_query_verified_attributes, or registered via POST /v1/schemas."
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy
• lemma_query_verified_attributes reads unknown 13h ago

  Query cryptographically verified attributes from Lemma. Use this as the primary tool for finding documents whose attributes match given conditions (e.g., "subject's birthYear lt 2008"). Returns { results: Array<{ docHash, schema, issuerId, subjectId, attributes, isVerified, proof?: { status, circuitId, chainId }, disclosure? }>, hasMore }. The MCP layer enriches each item with an `isVerified` flag derived from `proof.status` (true when status is 'verified' or 'onchain-verified'). Use lemma_get_proof_status to monitor a specific proof; use lemma_get_schema to interpret the keys returned in `attributes`.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "properties": {
      "limit": {
        "type": "number",
        "maximum": 200,
        "minimum": 1,
        "description": "Max results per page (1–200). Defaults to API server default (50)."
      },
      "offset": {
        "type": "number",
        "minimum": 0,
        "description": "Pagination offset. Pair with `hasMore` in the response to walk pages."
      },
      "schemas": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "description": "Restrict results to documents conforming to these schema IDs."
      },
      "chainIds": {
        "type": "array",
        "items": {
          "type": "number"
        },
        "description": "Restrict results to attributes verified on these chain IDs (EVM)."
      },
      "attributes": {
        "type": "array",
        "items": {
          "type": "object",
          "required": [
            "name"
          ],
          "properties": {
            "name": {
              "type": "string",
              "description": "Attribute key as defined by the schema."
            },
            "value": {
              "description": "Comparison target value. Type depends on the schema's attribute definition. For 'in', pass an array."
            },
            "operator": {
              "enum": [
                "eq",
                "neq",
                "gt",
                "gte",
                "lt",
                "lte",
                "in",
                "contains"
              ],
              "type": "string",
              "description": "Comparison operator. Defaults to eq when omitted. 'in' takes an array value; 'contains' is substring/array-element match."
            }
          },
          "additionalProperties": false
        },
        "description": "Attribute predicates to AND-combine."
      }
    },
    "additionalProperties": false
  }

  arguments 66 lines copy
• lemma_get_circuit reads unknown 13h ago

  Retrieve a zero-knowledge proof circuit by its circuitId via GET /v1/circuits/{circuitId}. A circuit defines the constraints that proofs must satisfy and binds to a single schema. Returns CircuitMeta { circuitId, schema, description?, inputs?, verifier?: { type: 'onchain'|'offchain', address?, chainId? }, artifact?: { location: { type: 'ipfs'|'https', wasm, zkey } } }. Use this before lemma_submit_proof to confirm the circuit's schema, public inputs, and verifier configuration. Circuits are immutable; new variants get new circuitIds.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "circuitId"
    ],
    "properties": {
      "circuitId": {
        "type": "string",
        "description": "Circuit ID. Returned in the `proof.circuitId` field of VerifiedAttributesQueryResponseItem from lemma_query_verified_attributes, or registered via POST /v1/circuits. NOTE: this matches the OpenAPI field name `circuitId`, not a generic `id`."
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy
• lemma_get_generator reads unknown 13h ago

  Retrieve a Lemma document generator by generatorId via GET /v1/doc-generators/{generatorId}. A generator describes how a class of source documents is produced (e.g., what fields a 'KYC-v2' issuer must populate). Returns GeneratorMeta { generatorId, schema, description?, language?, source?: { type: 'url', uri }, inputsSpec?, outputsSpec? }. Each generator is bound to one schema. Use this when onboarding a new issuer or auditing how an existing schema is being populated.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "generatorId"
    ],
    "properties": {
      "generatorId": {
        "type": "string",
        "description": "Generator ID. Each generator is bound to a single schema and describes how source documents are produced. Registered via POST /v1/doc-generators. NOTE: this matches the OpenAPI field name `generatorId`, not a generic `id`."
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy

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