Agent Credit Bureau

Agent Credit Bureau Assess API

The Assess API from Agent Credit Bureau — 1 operation(s) for assess.

GitHub OpenAPI

Operations 1

POST /v0/assess Assess agent credit exposure #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/agentcreditdata-com/openapi/agentcreditdata-com-assess-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-report-snapshot-schema.json
📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-obligations-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-verify-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-evidence-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-agent-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/agentcreditdata-com/json-schema/agentcreditdata-com-assess-response-schema.json

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OpenAPI Specification

agentcreditdata-com-assess-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Agent Credit Bureau Assess API
  version: 0.2.0
  description: Economic history and exposure evidence for AI agents. No loan recommendations or global score.
servers:
- url: https://agentcreditdata.com
tags:
- name: Assess
paths:
  /v0/assess:
    post:
      operationId: assess_agent_credit_exposure
      responses:
        '200':
          description: Evidence response; insufficiency is a valid result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AssessResponse'
        '402':
          description: x402 v2 PaymentRequired; also base64 encoded in PAYMENT-REQUIRED
        '400':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '404':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '409':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '413':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '422':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '429':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '503':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
        '504':
          description: Deterministic pilot error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PilotError'
      parameters:
      - in: query
        name: mode
        schema:
          type: string
          enum:
          - cached
          - fresh
          default: cached
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AssessRequest'
      security:
      - x402: []
      x-pricing:
        product: assess
        version: pilot-2026-09-v1
        amount_atomic: '100000'
        asset: '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913'
        network: eip155:8453
      tags:
      - Assess
      summary: Assess agent credit exposure
      x-summary-source: derived
components:
  schemas:
    ExposureComparison:
      type: object
      additionalProperties: false
      required:
      - state
      - scope
      - proposed_exposure_asset_seconds
      - largest_satisfied_comparable_principal
      - comparable_obligation_ids
      - partially_comparable_obligation_ids
      - reasons
      - rules_version
      - parameters
      properties:
        state:
          enum:
          - COMPARABLE_HISTORY_OBSERVED
          - PARTIALLY_COMPARABLE_HISTORY
          - INSUFFICIENT_COMPARABLE_HISTORY
          - INSUFFICIENT_COVERAGE
        scope:
          type: string
          minLength: 1
        proposed_exposure_asset_seconds:
          type: string
          pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
          maxLength: 100
        largest_satisfied_comparable_principal:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        comparable_obligation_ids:
          type: array
          items:
            type: string
            minLength: 1
        partially_comparable_obligation_ids:
          type: array
          items:
            type: string
            minLength: 1
        reasons:
          type: array
          items:
            type: string
            minLength: 1
        rules_version:
          type: string
          minLength: 1
        parameters:
          type: object
          additionalProperties:
            type: string
    ReportSnapshot:
      type: object
      additionalProperties: false
      required:
      - schema_version
      - methodology_version
      - snapshot_id
      - supersedes
      - as_of
      - subject
      - coverage
      - observed_counts
      - obligations
      - events
      - diagnostics
      - history_quality_flags
      - conflicting_evidence
      - unknowns
      - evidence
      properties:
        schema_version:
          enum:
          - 0.1.0
        methodology_version:
          type: string
          minLength: 1
        snapshot_id:
          type: string
          minLength: 1
        supersedes:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        as_of:
          type: string
          format: date-time
        subject:
          $ref: '#/components/schemas/Subject'
        coverage:
          type: array
          items:
            $ref: '#/components/schemas/Coverage'
        observed_counts:
          $ref: '#/components/schemas/ObservedCounts'
        obligations:
          type: array
          items:
            $ref: '#/components/schemas/Obligation'
        events:
          type: array
          items:
            $ref: '#/components/schemas/EconomicEvent'
        diagnostics:
          type: array
          items:
            $ref: '#/components/schemas/Diagnostics'
        history_quality_flags:
          type: array
          items:
            $ref: '#/components/schemas/HistoryQualityFlag'
        conflicting_evidence:
          type: array
          items:
            $ref: '#/components/schemas/Conflict'
        unknowns:
          type: array
          items:
            type: string
            minLength: 1
        evidence:
          type: array
          items:
            $ref: '#/components/schemas/EvidenceObservation'
    PrincipalInterval:
      type: object
      additionalProperties: false
      required:
      - start
      - end
      - outstanding
      properties:
        start:
          type: integer
          minimum: 0
        end:
          type: integer
          minimum: 0
        outstanding:
          type: string
          pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
          maxLength: 100
    EconomicEvent:
      type: object
      additionalProperties: false
      required:
      - id
      - obligation_id
      - kind
      - timestamp
      - asset
      - amount
      - principal_applied
      - actor
      - counterparty
      - transaction_hash
      - log_index
      - block_hash
      - basis
      - evidence_refs
      properties:
        id:
          type: string
          minLength: 1
        obligation_id:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        kind:
          enum:
          - TRANSFER_OBSERVED
          - BORROW
          - REPAY
          - SUPPLY_COLLATERAL
          - LIQUIDATION
          - PRINCIPAL_REPAYMENT_APPLIED
          - REFINANCE
          - DEFAULT_DECLARED
        timestamp:
          type: integer
          minimum: 0
        asset:
          anyOf:
          - $ref: '#/components/schemas/Asset'
          - type: 'null'
        amount:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        principal_applied:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        actor:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        counterparty:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        transaction_hash:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        log_index:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        block_hash:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        basis:
          type: string
          minLength: 1
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
    AssessRequest:
      type: object
      additionalProperties: false
      required:
      - subject
      - proposed_exposure
      properties:
        subject:
          type: string
          minLength: 1
        proposed_exposure:
          $ref: '#/components/schemas/ProposedExposure'
    RelationshipAssertion:
      type: object
      additionalProperties: false
      required:
      - classification
      - counterparty
      - controller_id
      - basis
      - evidence_refs
      properties:
        classification:
          enum:
          - INDEPENDENT
          - RELATED
          - TEST
          - UNKNOWN
        counterparty:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        controller_id:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        basis:
          type: string
          minLength: 1
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
    Diagnostics:
      type: object
      additionalProperties: false
      required:
      - asset
      - universe
      - raw_obligation_count
      - measured_obligation_count
      - economic_episode_count
      - economically_weighted_obligation_count
      - reference_exposure_asset_seconds
      - principal_volume
      - median_principal
      - largest_satisfied_principal
      - duration_distribution
      - cumulative_exposure_asset_seconds
      - cumulative_exposure_asset_days
      - exposure_by_relationship_asset_seconds
      - related_party_count_share
      - unknown_relationship_count_share
      - counterparty_wallet_hhi
      - counterparty_controller_hhi
      - independent_controller_count
      - repeated_amount_modal_share
      - repeated_duration_modal_share
      - repeated_start_gap_modal_share
      - micro_obligation_count_share
      - history_inflation_ratio
      - flags
      - unknowns
      properties:
        asset:
          $ref: '#/components/schemas/Asset'
        universe:
          type: string
          minLength: 1
        raw_obligation_count:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        measured_obligation_count:
          type: integer
          minimum: 0
        economic_episode_count:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        economically_weighted_obligation_count:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        reference_exposure_asset_seconds:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        principal_volume:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        median_principal:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        largest_satisfied_principal:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        duration_distribution:
          anyOf:
          - $ref: '#/components/schemas/DurationDistribution'
          - type: 'null'
        cumulative_exposure_asset_seconds:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        cumulative_exposure_asset_days:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        exposure_by_relationship_asset_seconds:
          anyOf:
          - type: object
            additionalProperties:
              type: string
              pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
              maxLength: 100
          - type: 'null'
        related_party_count_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        unknown_relationship_count_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        counterparty_wallet_hhi:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        counterparty_controller_hhi:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        independent_controller_count:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        repeated_amount_modal_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        repeated_duration_modal_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        repeated_start_gap_modal_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        micro_obligation_count_share:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        history_inflation_ratio:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        flags:
          type: array
          items:
            $ref: '#/components/schemas/HistoryQualityFlag'
        unknowns:
          type: array
          items:
            type: string
            minLength: 1
    ControlEpoch:
      type: object
      additionalProperties: false
      required:
      - id
      - starts_at
      - ends_at
      - continuity
      - evidence_refs
      properties:
        id:
          type: string
          minLength: 1
        starts_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
        ends_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
        continuity:
          enum:
          - EVIDENCED
          - UNKNOWN
          - BROKEN
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
    ProposedExposure:
      type: object
      additionalProperties: false
      required:
      - asset
      - principal
      - duration_seconds
      - secured
      - obligation_type
      properties:
        asset:
          $ref: '#/components/schemas/Asset'
        principal:
          type: string
          pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
          maxLength: 100
        duration_seconds:
          type: integer
          minimum: 1
        secured:
          type: boolean
        obligation_type:
          enum:
          - loan
          - trade_credit
          - protocol_position
    EvidenceObservation:
      type: object
      additionalProperties: false
      required:
      - id
      - source_url
      - retrieved_at
      - raw_path
      - sha256
      - request_metadata_path
      - basis
      - finality
      properties:
        id:
          type: string
          minLength: 1
        source_url:
          type: string
          minLength: 1
        retrieved_at:
          type: string
          format: date-time
        raw_path:
          type: string
          minLength: 1
        sha256:
          type: string
          pattern: ^[0-9a-f]{64}$
        request_metadata_path:
          type: string
          minLength: 1
        basis:
          enum:
          - ISSUER_ASSERTION
          - RPC_OBSERVATION
          - INDEXER_OBSERVATION
        finality:
          enum:
          - NOT_INDEPENDENTLY_VERIFIED
    IdentityLink:
      type: object
      additionalProperties: false
      required:
      - from_identifier
      - to_identifier
      - predicate
      - valid_from
      - valid_until
      - evidence_refs
      - limitation
      properties:
        from_identifier:
          type: string
          minLength: 1
        to_identifier:
          type: string
          minLength: 1
        predicate:
          type: string
          minLength: 1
        valid_from:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
        valid_until:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
        limitation:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
    Conflict:
      type: object
      additionalProperties: false
      required:
      - field
      - assertions
      - resolution
      - evidence_refs
      properties:
        field:
          type: string
          minLength: 1
        assertions:
          type: array
          items:
            type: string
            minLength: 1
        resolution:
          type: string
          minLength: 1
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
    HistoryQualityFlag:
      type: object
      additionalProperties: false
      required:
      - code
      - basis
      - parameters
      - evidence_refs
      properties:
        code:
          enum:
          - SYNTHETIC_ACTIVITY_PATTERN
          - HISTORY_INFLATION_DETECTED
          - MICRO_OBLIGATION_CONCENTRATION
          - RELATED_COUNTERPARTY_CONCENTRATION
          - ABNORMALLY_SHORT_DURATION
          - LOW_ECONOMIC_EXPOSURE
          - INSUFFICIENT_COVERAGE
          - INSUFFICIENT_COMPARABLE_HISTORY
        basis:
          type: string
          minLength: 1
        parameters:
          type: object
          additionalProperties:
            type: string
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
    Asset:
      type: object
      additionalProperties: false
      required:
      - id
      - symbol
      - decimals
      properties:
        id:
          type: string
          minLength: 1
        symbol:
          type: string
          minLength: 1
        decimals:
          type: integer
          minimum: 0
    Subject:
      type: object
      additionalProperties: false
      required:
      - id
      - kind
      - identifiers
      - identity_links
      - control_epochs
      properties:
        id:
          type: string
          minLength: 1
        kind:
          enum:
          - REGISTERED_AGENT
          - ECONOMIC_WALLET_AGENT_STATUS_UNKNOWN
          - ORGANIZATION
        identifiers:
          type: array
          items:
            $ref: '#/components/schemas/Identifier'
        identity_links:
          type: array
          items:
            $ref: '#/components/schemas/IdentityLink'
        control_epochs:
          type: array
          items:
            $ref: '#/components/schemas/ControlEpoch'
    ObservedCounts:
      type: object
      additionalProperties: false
      required:
      - open
      - completed
      - late
      - defaulted
      - liquidated
      - scope
      properties:
        open:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        completed:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        late:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        defaulted:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        liquidated:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        scope:
          type: string
          minLength: 1
    PilotError:
      type: object
      required:
      - code
      - message
      - request_id
      additionalProperties: false
      properties:
        code:
          type: string
        message:
          type: string
        request_id:
          type: string
    AssessResponse:
      type: object
      additionalProperties: false
      required:
      - report
      - proposed_exposure
      - comparison
      properties:
        report:
          $ref: '#/components/schemas/ReportSnapshot'
        proposed_exposure:
          $ref: '#/components/schemas/ProposedExposure'
        comparison:
          $ref: '#/components/schemas/ExposureComparison'
    Obligation:
      type: object
      additionalProperties: false
      required:
      - id
      - economic_exposure_id
      - grouping_basis
      - subject_id
      - asset
      - obligation_type
      - status
      - original_principal
      - outstanding_principal
      - started_at
      - ended_at
      - due_at
      - due_semantics
      - late
      - secured
      - guarantee
      - repayment_actor
      - closure_funding
      - terms_basis
      - exposure_basis
      - intervals
      - relationship
      - control_epoch_id
      - evidence_refs
      - unknowns
      properties:
        id:
          type: string
          minLength: 1
        economic_exposure_id:
          type: string
          minLength: 1
        grouping_basis:
          type: string
          minLength: 1
        subject_id:
          type: string
          minLength: 1
        asset:
          $ref: '#/components/schemas/Asset'
        obligation_type:
          enum:
          - loan
          - trade_credit
          - protocol_position
        status:
          enum:
          - OPEN
          - SATISFIED
          - ISSUER_REPORTED_SATISFIED
          - LIQUIDATED
          - REFINANCED
          - DEFAULTED
          - UNKNOWN
        original_principal:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        outstanding_principal:
          anyOf:
          - type: string
            pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
            maxLength: 100
          - type: 'null'
        started_at:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        ended_at:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        due_at:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        due_semantics:
          enum:
          - KNOWN
          - UNKNOWN
          - NOT_APPLICABLE
        late:
          anyOf:
          - type: boolean
          - type: 'null'
        secured:
          anyOf:
          - type: boolean
          - type: 'null'
        guarantee:
          enum:
          - PRESENT
          - ABSENT
          - UNKNOWN
        repayment_actor:
          anyOf:
          - type: string
            minLength: 1
          - type: 'null'
        closure_funding:
          enum:
          - BORROWER_FUNDS
          - BORROWER_WALLET_SOURCE_UNKNOWN
          - GUARANTOR
          - LIQUIDATION
          - REFINANCING
          - UNKNOWN
        terms_basis:
          enum:
          - AUTHENTICATED_TERMS
          - ISSUER_ASSERTION
          - PROTOCOL_RULES
          - UNKNOWN
        exposure_basis:
          enum:
          - PRINCIPAL_LEDGER
          - ISSUER_LIFECYCLE_TRANSFER_CORROBORATED
          - UNKNOWN
        intervals:
          anyOf:
          - type: array
            items:
              $ref: '#/components/schemas/PrincipalInterval'
          - type: 'null'
        relationship:
          $ref: '#/components/schemas/RelationshipAssertion'
        control_epoch_id:
          type: string
          minLength: 1
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
        unknowns:
          type: array
          items:
            type: string
            minLength: 1
    DurationDistribution:
      type: object
      additionalProperties: false
      required:
      - minimum_seconds
      - median_seconds
      - maximum_seconds
      properties:
        minimum_seconds:
          type: integer
          minimum: 0
        median_seconds:
          type: string
          pattern: ^(0|[1-9][0-9]*)(\.[0-9]+)?$
          maxLength: 100
        maximum_seconds:
          type: integer
          minimum: 0
    Identifier:
      type: object
      additionalProperties: false
      required:
      - kind
      - value
      properties:
        kind:
          enum:
          - WALLET
          - ERC8004
          - A2A
          - MCP
          - DOMAIN
          - ENS
          - DID
          - ORGANIZATION
        value:
          type: string
          minLength: 1
    Coverage:
      type: object
      additionalProperties: false
      required:
      - source
      - scope
      - status
      - retrieved_at
      - event_start
      - event_end
      - observed_records
      - reported_total_records
      - lifecycle_measurable
      - limitations
      - evidence_refs
      properties:
        source:
          type: string
          minLength: 1
        scope:
          type: string
          minLength: 1
        status:
          enum:
          - COMPLETE_FOR_SCOPE
          - PARTIAL
          - ERROR
        retrieved_at:
          type: string
          format: date-time
        event_start:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        event_end:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        observed_records:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        reported_total_records:
          anyOf:
          - type: integer
            minimum: 0
          - type: 'null'
        lifecycle_measurable:
          type: boolean
        limitations:
          type: array
          items:
            type: string
            minLength: 1
        evidence_refs:
          type: array
          items:
            type: string
            minLength: 1
  securitySchemes:
    x402:
      type: apiKey
      in: header
      name: PAYMENT-SIGNATURE
      description: Base64 x402 v2 PaymentPayload; receipt returned in PAYMENT-RESPONSE.