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OpenAPI Specification
openapi: 3.2.0
info:
title: Agent Verification Utility MCP API
version: 0.4.3
description: A deterministic, x402-paid JSON evidence verification service for external agents. The service attests that declared checks were executed; it does not attest real-world truth.
license:
name: UNLICENSED
servers:
- url: /
description: Relative to the current deployment origin
security: []
tags:
- name: MCP
description: Stateless MCP Streamable HTTP transport
paths:
/server.json:
get:
operationId: getMcpRegistryServer
summary: Get the official MCP Registry publication document
description: Remote-server metadata using the official MCP Registry server.json schema. The publication namespace is derived from the configured public domain.
tags:
- MCP
responses:
'200':
description: MCP Registry remote server document
content:
application/json:
schema:
type: object
/mcp/server.json:
get:
operationId: getMcpRegistryServerAlias
summary: Get the MCP Registry publication document beside the MCP endpoint
tags:
- MCP
responses:
'200':
description: The same MCP Registry document as /server.json
content:
application/json:
schema:
type: object
/.well-known/mcp-registry-auth:
get:
operationId: getMcpRegistryHttpProof
summary: Get the optional MCP Registry HTTP domain-ownership proof
description: Returns 404 until an operator generates a registry key and deploys its public proof. Private key material is never served.
tags:
- MCP
responses:
'200':
description: MCP Registry public proof record
content:
text/plain:
schema:
type: string
'404':
description: Registry proof is not configured
/docs/mcp-x402-interoperability:
get:
operationId: getMcpX402InteroperabilityGuide
summary: Read the MCP and x402 interoperability guide
tags:
- MCP
responses:
'200':
$ref: '#/components/responses/KnowledgeDocument'
/webmcp.js:
get:
operationId: getWebMcpBridge
summary: Get the feature-detected browser WebMCP bridge
tags:
- MCP
responses:
'200':
description: Same-origin JavaScript bridge from WebMCP to the live MCP endpoint
content:
text/javascript:
schema:
type: string
/mcp/server-card:
get:
operationId: getCurrentMcpServerCard
summary: Get the current experimental MCP Server Card
description: Publishes the experimental MCP Server Card v1 document next to the Streamable HTTP endpoint. Tool inventory remains authoritative at runtime through tools/list.
tags:
- MCP
responses:
'200':
description: Experimental MCP Server Card
headers:
ETag:
schema:
type: string
description: Strong SHA-256 entity tag; If-None-Match is supported.
content:
application/mcp-server-card+json:
schema:
type: object
required:
- $schema
- name
- description
- version
- remotes
properties:
$schema:
type: string
const: https://static.modelcontextprotocol.io/schemas/v1/server-card.schema.json
name:
type: string
const: dev.kgninja/agent-verification-utility
title:
type: string
description:
type: string
maxLength: 100
version:
type: string
websiteUrl:
type: string
format: uri
icons:
type: array
items:
type: object
additionalProperties: true
remotes:
type: array
minItems: 1
items:
type: object
additionalProperties: true
_meta:
type: object
additionalProperties: true
additionalProperties: true
'304':
description: Not modified
/mcp:
post:
operationId: mcpStreamableHttp
summary: Stateless MCP SDK v2 Streamable HTTP endpoint
description: Exposes free discovery, revenue-goal, and quote tools plus the paid verify_evidence tool. The paid MCP tool uses x402 metadata and shares the audited POST /verify-evidence settlement and D1 ledger path.
tags:
- MCP
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: true
responses:
'200':
description: MCP protocol response
content:
application/json:
schema:
type: object
additionalProperties: true
text/event-stream:
schema:
type: string
'400':
$ref: '#/components/responses/BadRequest'
'429':
$ref: '#/components/responses/RateLimited'
'503':
$ref: '#/components/responses/Unavailable'
components:
schemas:
PaidVerificationBinding:
type: object
description: The immutable spend binding. quoted/payment_required have no paid receipt or refusal; refused has a refusal reason and no paid receipt; delivered has a paid receipt and no refusal reason, including when deterministic verification outcome is fail.
additionalProperties: false
required:
- schema_version
- binding_digest
- precheck_receipt_digest
- request_hash
- evidence_digest
- policy_version
- price_cap_atomic
- quoted_amount_atomic
- network
- asset
- pay_to
- quote_id
- expires_at
- discovery_survived
- state
- paid_receipt_id
- refusal_reason
properties:
schema_version:
type: string
const: agent-economy/paid-verification-binding/1.0
binding_digest:
$ref: '#/components/schemas/Sha256Digest'
precheck_receipt_digest:
$ref: '#/components/schemas/Sha256Digest'
request_hash:
$ref: '#/components/schemas/Sha256Digest'
evidence_digest:
$ref: '#/components/schemas/Sha256Digest'
policy_version:
type: string
const: agent-economy/precheck-policy/2.0
price_cap_atomic:
type: string
maxLength: 16
pattern: ^[1-9][0-9]*$
quoted_amount_atomic:
type: string
maxLength: 16
pattern: ^[1-9][0-9]*$
network:
type: string
enum:
- eip155:84532
- eip155:8453
asset:
type: string
pattern: ^0x[a-fA-F0-9]{40}$
pay_to:
type: string
pattern: ^0x[a-fA-F0-9]{40}$
quote_id:
type: string
pattern: ^qte_[A-Za-z0-9_-]+$
expires_at:
type: string
format: date-time
discovery_survived:
type: boolean
const: true
state:
type: string
enum:
- quoted
- payment_required
- delivered
- refused
paid_receipt_id:
oneOf:
- type: string
pattern: ^rcpt_[A-Za-z0-9_-]+$
- type: 'null'
refusal_reason:
oneOf:
- type: string
pattern: ^[A-Z0-9_]+$
- type: 'null'
oneOf:
- properties:
state:
enum:
- quoted
- payment_required
paid_receipt_id:
type: 'null'
refusal_reason:
type: 'null'
- properties:
state:
const: delivered
paid_receipt_id:
type: string
pattern: ^rcpt_[A-Za-z0-9_-]+$
refusal_reason:
type: 'null'
- properties:
state:
const: refused
paid_receipt_id:
type: 'null'
refusal_reason:
type: string
pattern: ^[A-Z0-9_]+$
Sha256Digest:
type: string
pattern: ^sha256:[a-f0-9]{64}$
RefusedPaidVerificationBinding:
allOf:
- $ref: '#/components/schemas/PaidVerificationBinding'
- properties:
state:
const: refused
ErrorResponse:
type: object
additionalProperties: false
required:
- error
properties:
error:
type: object
additionalProperties: false
required:
- code
- message
- request_id
- retryable
properties:
code:
type: string
pattern: ^[A-Z0-9_]+$
message:
type: string
request_id:
type: string
retryable:
type: boolean
details:
type: object
properties:
paid_verification_binding:
$ref: '#/components/schemas/RefusedPaidVerificationBinding'
additionalProperties: true
responses:
RateLimited:
description: Rate limit exceeded
headers:
Retry-After:
schema:
type: integer
minimum: 1
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
Unavailable:
description: Kill switch, maintenance, budget exhaustion, facilitator outage, or unavailable cost basis
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
BadRequest:
description: Malformed request
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
KnowledgeDocument:
description: Technical documentation with HTML and agent-optimized Markdown representations
headers:
Vary:
schema:
type: string
const: Accept
ETag:
schema:
type: string
X-Markdown-Tokens:
description: Approximate token count on the Markdown representation
schema:
type: integer
minimum: 1
content:
text/html:
schema:
type: string
text/markdown:
schema:
type: string
securitySchemes:
agentRegistration:
type: http
scheme: bearer
bearerFormat: signed anonymous registration receipt
description: Optional 15-minute service-local receipt used only to inspect its own registration claim. It grants no API access and does not authorize payment.
x-provenance:
method: harvested
publisher: KG-NINJA
source: https://agent-economy.kgninja.dev/openapi.json
note: split by refine-openapis from the provider's own published document, verified by fetch (openapi/_original/*.fetch.json);
stamped by stamp-openapi-provenance.py (roadmap#793)