openapi: 3.2.0
info:
  title: Taskfolk Agent Commerce Mpp API
  version: 1.0.0
  description: 'Machine-payable operations on Taskfolk (https://taskfolk.ai): one-time AI credit purchases for a workspace via the Machine Payments Protocol (HTTP 402). The full product REST API is described at https://taskfolk.ai/api/v1/openapi.json; agent commerce is also available via ACP (https://taskfolk.ai/.well-known/acp.json) and UCP (https://taskfolk.ai/.well-known/ucp).'
servers:
- url: https://taskfolk.ai
tags:
- name: Mpp
paths:
  /api/mpp/v1/credits/small:
    post:
      operationId: buyCreditsSmall
      summary: Buy the small AI credit pack (2,000 credits)
      description: '2,000 AI credits added to the workspace balance. Credits never expire while the workspace is active. MPP charge flow: call once with your workspace API key (Authorization: Bearer or X-Api-Key; admin scope from an owner/admin key) to receive HTTP 402 with a WWW-Authenticate Payment challenge. Retry with X-Api-Key plus Authorization: Payment payload="<base64url JSON>" carrying {"challenge_id", "shared_payment_token"} for a delegated Stripe token, or {"challenge_id", "use_saved_card": true} to charge the workspace''s saved card. Success returns a signed Payment-Receipt header; AI credits are granted to the workspace after payment confirmation.'
      x-payment-info:
        intent: charge
        method: stripe
        amount: '2000'
        currency: USD
        description: 'Small AI credit pack: 2,000 AI credits for USD 20.00.'
        offers:
        - intent: charge
          method: stripe
          amount: '2000'
          currency: USD
          description: 'Small AI credit pack: 2,000 AI credits for USD 20.00.'
      responses:
        '200':
          description: Payment accepted. Carries a Payment-Receipt header (base64url JSON, Ed25519-signed with the key published at /.well-known/ucp signing_keys).
        '400':
          description: Invalid request or malformed Payment credential.
        '401':
          description: Missing or invalid API key.
        '402':
          description: Payment Required. WWW-Authenticate carries a single-use Payment challenge (10 minute expiry).
        '403':
          description: API key lacks the admin scope or owner/admin role.
      tags:
      - Mpp
  /api/mpp/v1/credits/medium:
    post:
      operationId: buyCreditsMedium
      summary: Buy the medium AI credit pack (5,500 credits)
      description: '5,500 AI credits added to the workspace balance (9% bulk discount). Credits never expire while the workspace is active. MPP charge flow: call once with your workspace API key (Authorization: Bearer or X-Api-Key; admin scope from an owner/admin key) to receive HTTP 402 with a WWW-Authenticate Payment challenge. Retry with X-Api-Key plus Authorization: Payment payload="<base64url JSON>" carrying {"challenge_id", "shared_payment_token"} for a delegated Stripe token, or {"challenge_id", "use_saved_card": true} to charge the workspace''s saved card. Success returns a signed Payment-Receipt header; AI credits are granted to the workspace after payment confirmation.'
      x-payment-info:
        intent: charge
        method: stripe
        amount: '5000'
        currency: USD
        description: 'Medium AI credit pack: 5,500 AI credits for USD 50.00.'
        offers:
        - intent: charge
          method: stripe
          amount: '5000'
          currency: USD
          description: 'Medium AI credit pack: 5,500 AI credits for USD 50.00.'
      responses:
        '200':
          description: Payment accepted. Carries a Payment-Receipt header (base64url JSON, Ed25519-signed with the key published at /.well-known/ucp signing_keys).
        '400':
          description: Invalid request or malformed Payment credential.
        '401':
          description: Missing or invalid API key.
        '402':
          description: Payment Required. WWW-Authenticate carries a single-use Payment challenge (10 minute expiry).
        '403':
          description: API key lacks the admin scope or owner/admin role.
      tags:
      - Mpp
  /api/mpp/v1/credits/large:
    post:
      operationId: buyCreditsLarge
      summary: Buy the large AI credit pack (12,000 credits)
      description: '12,000 AI credits added to the workspace balance (17% bulk discount). Credits never expire while the workspace is active. MPP charge flow: call once with your workspace API key (Authorization: Bearer or X-Api-Key; admin scope from an owner/admin key) to receive HTTP 402 with a WWW-Authenticate Payment challenge. Retry with X-Api-Key plus Authorization: Payment payload="<base64url JSON>" carrying {"challenge_id", "shared_payment_token"} for a delegated Stripe token, or {"challenge_id", "use_saved_card": true} to charge the workspace''s saved card. Success returns a signed Payment-Receipt header; AI credits are granted to the workspace after payment confirmation.'
      x-payment-info:
        intent: charge
        method: stripe
        amount: '10000'
        currency: USD
        description: 'Large AI credit pack: 12,000 AI credits for USD 100.00.'
        offers:
        - intent: charge
          method: stripe
          amount: '10000'
          currency: USD
          description: 'Large AI credit pack: 12,000 AI credits for USD 100.00.'
      responses:
        '200':
          description: Payment accepted. Carries a Payment-Receipt header (base64url JSON, Ed25519-signed with the key published at /.well-known/ucp signing_keys).
        '400':
          description: Invalid request or malformed Payment credential.
        '401':
          description: Missing or invalid API key.
        '402':
          description: Payment Required. WWW-Authenticate carries a single-use Payment challenge (10 minute expiry).
        '403':
          description: API key lacks the admin scope or owner/admin role.
      tags:
      - Mpp
  /api/mpp/v1/credits/custom:
    post:
      operationId: buyCreditsCustom
      summary: Buy a custom amount of AI credits (1 cent per credit)
      description: 'Buy an exact number of AI credits at list price (USD 0.01 per credit). Quantity is the credit count, between 500 and 50,000. MPP charge flow: call once with your workspace API key (Authorization: Bearer or X-Api-Key; admin scope from an owner/admin key) to receive HTTP 402 with a WWW-Authenticate Payment challenge. Retry with X-Api-Key plus Authorization: Payment payload="<base64url JSON>" carrying {"challenge_id", "shared_payment_token"} for a delegated Stripe token, or {"challenge_id", "use_saved_card": true} to charge the workspace''s saved card. Success returns a signed Payment-Receipt header; AI credits are granted to the workspace after payment confirmation.'
      x-payment-info:
        intent: charge
        method: stripe
        amount: '500'
        currency: USD
        description: Minimum shown (500 credits = USD 5.00); the actual charge is 1 cent per requested credit, 500 to 50,000 credits.
        offers:
        - intent: charge
          method: stripe
          amount: '500'
          currency: USD
          description: Minimum shown (500 credits = USD 5.00); the actual charge is 1 cent per requested credit, 500 to 50,000 credits.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - credits
              properties:
                credits:
                  type: integer
                  minimum: 500
                  maximum: 50000
                  description: Number of AI credits to buy (1 credit = USD 0.01).
      responses:
        '200':
          description: Payment accepted. Carries a Payment-Receipt header (base64url JSON, Ed25519-signed with the key published at /.well-known/ucp signing_keys).
        '400':
          description: Invalid request or malformed Payment credential.
        '401':
          description: Missing or invalid API key.
        '402':
          description: Payment Required. WWW-Authenticate carries a single-use Payment challenge (10 minute expiry).
        '403':
          description: API key lacks the admin scope or owner/admin role.
      tags:
      - Mpp
x-service-info:
  categories:
  - software
  - productivity
  - project-management
  docs:
    homepage: https://taskfolk.ai
    apiReference: https://taskfolk.ai/api/v1/reference
    llms: https://taskfolk.ai/llms.txt