thirdweb

thirdweb Payments API

Bridge, swap, convert, onramp, and x402 payments.

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OpenAPI Specification

openapi: 3.0.1
info:
  title: thirdweb Authentication Payments API
  description: thirdweb provides a unified interface for Web3 development. This specification documents real, publicly documented HTTP endpoints across the thirdweb unified API (api.thirdweb.com - wallets, transactions, contracts, tokens, payments and bridge), Engine (backend transaction execution), Insight (indexed on-chain data) and Nebula (AI blockchain interface). Authenticate frontend usage with an x-client-id header (plus x-bundle-id for native apps) or a Bearer JWT, and backend usage with an x-secret-key header.
  termsOfService: https://thirdweb.com/tos
  contact:
    name: thirdweb Support
    url: https://thirdweb.com/support
  version: '1.22'
servers:
- url: https://api.thirdweb.com
  description: thirdweb unified API (wallets, transactions, contracts, tokens, payments, bridge)
- url: https://engine.thirdweb.com
  description: thirdweb Engine (backend transaction execution)
- url: https://insight.thirdweb.com
  description: thirdweb Insight (indexed on-chain data)
- url: https://nebula-api.thirdweb.com
  description: thirdweb Nebula (AI blockchain interface)
security:
- SecretKeyAuth: []
- ClientAuth: []
- BearerAuth: []
tags:
- name: Payments
  description: Bridge, swap, convert, onramp, and x402 payments.
paths:
  /v1/bridge/chains:
    get:
      operationId: bridgeChains
      tags:
      - Payments
      summary: List chains supported for bridging.
      responses:
        '200':
          description: Supported chains.
  /v1/bridge/routes:
    get:
      operationId: bridgeRoutes
      tags:
      - Payments
      summary: List supported bridge/swap routes.
      responses:
        '200':
          description: Supported routes.
  /v1/bridge/convert:
    get:
      operationId: bridgeConvert
      tags:
      - Payments
      summary: Convert a fiat amount to a crypto quote.
      responses:
        '200':
          description: Conversion quote.
  /v1/bridge/swap:
    post:
      operationId: bridgeSwap
      tags:
      - Payments
      summary: Swap or bridge tokens.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BridgeSwapRequest'
      responses:
        '200':
          description: Swap prepared.
  /v1/payments/x402/verify:
    post:
      operationId: x402Verify
      tags:
      - Payments
      summary: Verify an x402 payment.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Verification result.
  /v1/payments/x402/settle:
    post:
      operationId: x402Settle
      tags:
      - Payments
      summary: Settle an x402 payment.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Settlement result.
  /v1/payments/x402/supported:
    get:
      operationId: x402Supported
      tags:
      - Payments
      summary: List supported x402 payment methods.
      responses:
        '200':
          description: Supported payment methods.
components:
  schemas:
    BridgeSwapRequest:
      type: object
      properties:
        tokenIn:
          type: object
          description: Source token (chainId and address).
        tokenOut:
          type: object
          description: Destination token (chainId and address).
        exact:
          type: string
          description: Exact input or output amount.
        from:
          type: string
        receiver:
          type: string
        slippageToleranceBps:
          type: integer
      required:
      - tokenIn
      - tokenOut
  securitySchemes:
    ClientAuth:
      type: apiKey
      in: header
      name: x-client-id
      description: Client ID for frontend usage. Web sends x-client-id only; native apps also send x-bundle-id.
    BundleIdAuth:
      type: apiKey
      in: header
      name: x-bundle-id
      description: Bundle ID for native (desktop/mobile) platform authentication alongside x-client-id.
    SecretKeyAuth:
      type: apiKey
      in: header
      name: x-secret-key
      description: Secret key for backend usage; never expose publicly.
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT access token obtained from wallet authentication, for frontend usage.