aiagentscity-com X402 API

openapi: 3.2.0
info:
  title: AgentLedger X402 API
  version: 0.4.7
  x-guidance: 'AgentLedger is per-agent AI spend tracking with ENFORCED budget caps. Two ways in, both machine-only. (1) FREE, no wallet: POST /start mints a workspace_key (shown once) with no signup and no card — GET /start only renders the form and does NOT mint. Claim an agent with the key in the body of POST /v1/track, set a cap with POST /v1/budget, then route traffic through /proxy/{provider}/... so an over-budget call is refused with 402 BEFORE the provider is contacted. (2) PAID, no human: POST /v1/billing/x402 with a wallet-signed x402 payment mints a workspace bound to the paying wallet. NOTE: a workspace_key claims NEW agents; an agent_secret writes to an existing one. Plain POST /v1/track can reject the ledger write that would cross a cap but cannot un-spend a charge that already happened — only the proxy/wrapper path stops money.'
tags:
- name: X402
paths:
  /api/x402/agent-watch/probe:
    post:
      summary: Paid Probe
      description: 'x402-payable endpoint probe — same upstream as the free

        /api/agent-watch/probe, minus the rate limit (the payment IS the limiter).


        Ordering is load-bearing in BOTH directions:

        • an unpaid caller gets the 402 price challenge BEFORE its body is judged,

        so a sweeper that posts an empty body learns the price instead of a 422

        (measured live 2026-10-23: a bare 422 hid this listing from sweepers);

        • a caller who has presented a payment is validated BEFORE settlement, so

        a 422 never costs the payer.'
      operationId: paid_probe_api_x402_agent_watch_probe_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ProbeRequest'
              title: Body
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
        '402':
          description: Payment required. The PAYMENT-REQUIRED response header carries the base64url x402 challenge (price, network, asset, payTo, maxTimeoutSeconds).
          headers:
            PAYMENT-REQUIRED:
              description: base64url x402 payment challenge
              schema:
                type: string
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
      x-payment-info:
        x402:
          protocols:
          - protocol: x402
            version: 2
            scheme: exact
            network: eip155:8453
          pricingMode: fixed
          currency: USDC
          amountUnit: atomic
          amount: '100000'
          asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
          network: eip155:8453
          payTo: '0x363c520492EDbA89057bCe696B74263B3295a72A'
          priceUsd: 0.1
          priceDescription: $0.10 USDC per call — Agent Watch
      tags:
      - X402
  /api/x402/agent-watch/census:
    get:
      summary: Paid Census
      description: x402-payable ecosystem census snapshot.
      operationId: paid_census_api_x402_agent_watch_census_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '402':
          description: Payment required. The PAYMENT-REQUIRED response header carries the base64url x402 challenge (price, network, asset, payTo, maxTimeoutSeconds).
          headers:
            PAYMENT-REQUIRED:
              description: base64url x402 payment challenge
              schema:
                type: string
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
      x-payment-info:
        x402:
          protocols:
          - protocol: x402
            version: 2
            scheme: exact
            network: eip155:8453
          pricingMode: fixed
          currency: USDC
          amountUnit: atomic
          amount: '100000'
          asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
          network: eip155:8453
          payTo: '0x363c520492EDbA89057bCe696B74263B3295a72A'
          priceUsd: 0.1
          priceDescription: $0.10 USDC per call — Agent Watch
      tags:
      - X402
  /api/x402/trustscan/npm:
    post:
      summary: Paid Trustscan Npm
      description: 'x402-payable npm trust check — same verdict as the free

        /api/trustscan/npm form, minus the rate limit.


        Same two-way ordering as the probe: price first for an unpaid caller, body

        judged before settlement for a paying one.'
      operationId: paid_trustscan_npm_api_x402_trustscan_npm_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NpmCheckRequest'
              title: Body
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
        '402':
          description: Payment required. The PAYMENT-REQUIRED response header carries the base64url x402 challenge (price, network, asset, payTo, maxTimeoutSeconds).
          headers:
            PAYMENT-REQUIRED:
              description: base64url x402 payment challenge
              schema:
                type: string
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
      x-payment-info:
        x402:
          protocols:
          - protocol: x402
            version: 2
            scheme: exact
            network: eip155:8453
          pricingMode: fixed
          currency: USDC
          amountUnit: atomic
          amount: '100000'
          asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
          network: eip155:8453
          payTo: '0x363c520492EDbA89057bCe696B74263B3295a72A'
          priceUsd: 0.1
          priceDescription: $0.10 USDC per call — TrustScan
      tags:
      - X402
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    NpmCheckRequest:
      properties:
        package:
          type: string
          maxLength: 214
          title: Package
      type: object
      required:
      - package
      title: NpmCheckRequest
    ProbeRequest:
      properties:
        url:
          type: string
          maxLength: 2048
          title: Url
      type: object
      required:
      - url
      title: ProbeRequest
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
x-service-info:
  docs:
    llms: /llms.txt
x-products:
- id: trustscan
  x-slot: trust
  x-direction: outward
  x-connect:
    mcp: https://aiagentscity.com/mcp/trustscan
    paid_call: POST https://aiagentscity.com/api/x402/trustscan/npm
    human: https://aiagentscity.com/trust-scan
  tagline: Scan before you trust
  free_proof: POST /api/trustscan/npm returns registry facts + a typosquat screen for any package, unauthenticated — the same check is payable per call over x402 without the rate limit; remote deep scans are path-scoped to the host
- id: agent-watch
  x-slot: trust
  x-direction: outward
  x-connect:
    mcp: https://aiagentscity.com/mcp/agent-watch
    paid_call: POST https://aiagentscity.com/api/x402/agent-watch/probe
    human: https://aiagentscity.com/agent-watch
  tagline: Is this agent or MCP server real and still behaving?
  free_proof: aw_health + aw_census MCP tools are open reads — live census data, no auth
- id: perimeter-watch
  x-slot: trust
  x-direction: outward
  x-connect:
    mcp: https://aiagentscity.com/mcp/perimeter-watch
    human: https://aiagentscity.com/perimeter-watch
  tagline: Is your endpoint still what it claims — checked from the outside?
  free_proof: free browser snapshot — https://entradox.github.io/perimeter-watch-site/
- id: benefits-city
  x-slot: outcome
  x-direction: outward
  x-connect:
    mcp: https://aiagentscity.com/benefits/mcp
    human: https://aiagentscity.com/benefits
  tagline: Verified offer records — will this action actually pay?
  free_proof: search_bonuses / get_bonus MCP tools return hand-verified records with source URLs — no auth
- id: cited
  x-slot: outcome
  x-direction: outward
  x-connect:
    mcp: https://aiagentscity.com/mcp/cited
    human: https://aiagentscity.com/cited
  tagline: Prove the claim that AI recommends you — verbatim evidence
  free_proof: free browser scan — https://entradox.github.io/cited-site/
- id: agent-ledger
  x-slot: outcome
  x-direction: spine
  x-connect:
    mcp: https://aiagentscity.com/mcp/
    rest: https://aiagentscity.com/v1/
    install: npx @aiagentscity/setup ledger
    human: https://aiagentscity.com/agent-ledger
  tagline: Metered, capped, receipted agent spend — proof of what every cent bought
  free_proof: POST /start mints a free workspace (3 agents, every rail) — no signup, no card
- id: workbench-kit
  x-slot: trust+outcome
  x-direction: inward
  x-connect:
    install: npx @aiagentscity/setup workbench
    human: https://aiagentscity.com/workbench
  tagline: Frame, gate, and close-receipt every agent task — proof of what your agents did
  free_proof: the whole kit is free and runs fully offline — `wb verify <receipt_id>` recomputes a close receipt against the local ledger
x-frame:
  frame: trust-and-outcome
  tagline: 'The trust-and-outcome clearing layer for the agent economy: before an agent acts, it verifies the counterparty; after it acts, it proves the result.'
  questions:
    trust: Before an agent acts — can it trust the counterparty?
    outcome: After an agent acts — did it work?
  directions:
    outward: verifies counterparties outside your fleet
    spine: the receipts rail every instrument writes through
    inward: verifies your own fleet's work
  parked: []