0x

0x Sources API

Sources API endpoints

GitHub OpenAPI

Operations 1

GET /sources Get Liquidity Sources #

Documentation

📖
Documentation
https://docs.0x.org/0x-swap-api/introduction
📖
Documentation
https://docs.0x.org/gasless-api/introduction
📖
Documentation
https://docs.0x.org/cross-chain-api/introduction
📖
Documentation
https://docs.0x.org/trade-analytics-api
📖
Documentation
https://docs.0x.org/api-reference

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/0x/refs/heads/main/openapi/0x-sources-api-openapi.yml

Code Examples

💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/swap-v2-allowance-holder-headless-example
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/swap-v2-permit2-headless-example
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/swap-v2-allowance-holder-next-app
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/swap-v2-permit2-next-app
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/swap-v2-with-foundry
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/gasless-v2-headless-example
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/gasless-v2-erc4337-smart-account
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/gasless-v2-trading-bot
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/cross-chain-headless-example
💻
CodeExamples
https://github.com/0xProject/0x-examples/tree/main/cross-chain-streaming-next-app

Other Resources

🔗
Signup
https://dashboard.0x.org/create-account
🔗
SDKs
https://github.com/0xProject/0x-swap-ts-sdk-migration
🔗
Tutorials
https://docs.0x.org/0x-swap-api/guides/swap-tokens-with-0x-swap-api
🔗
Signup
https://0x.org/products/cross-chain

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/0x-sources-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

0x-sources-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: 0x Cross-Chain Sources API
  description: This is the official API reference for the latest 0x API (v2).
  version: v2
  x-source-url: https://github.com/0xProject/0x-docs/blob/main/fern/openapi.json
  x-last-validated: '2026-05-28'
servers:
- url: https://api.0x.org
tags:
- name: Sources
  description: Sources API endpoints
paths:
  /sources:
    get:
      operationId: sources::getSources
      summary: Get Liquidity Sources
      description: Get the list of supported sources
      tags:
      - Sources
      parameters:
      - description: Visit dashboard.0x.org to get your API Key
        in: header
        name: 0x-api-key
        required: true
        schema:
          type: string
      - description: API version
        in: header
        name: 0x-version
        required: true
        schema:
          type: string
          example: v2
      - name: chainId
        in: query
        required: true
        schema:
          type: integer
          exclusiveMinimum: 0
        description: Chain ID. See [here](https://docs.0x.org/docs/introduction/supported-chains) for the list of supported chains
        example: 1
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  sources:
                    type: array
                    items:
                      type: string
                    description: The array of liquidity sources aggregated by 0x for the requested chain
                  zid:
                    type: string
                    description: The unique ZeroEx identifier of the request
                required:
                - sources
                - zid
                additionalProperties: false
              example:
                sources:
                - 0x_RFQ
                - Ambient
                - BalancerV1
                - BalancerV2
                - BancorV3
                - Curve
                - DodoV1
                - DodoV2
                - FraxswapV2
                - Integral
                - Lido
                - MakerPsm
                - Maverick
                - Origin
                - PancakeSwapV3
                - RocketPool
                - SolidlyV3
                - SushiSwap
                - Synapse
                - UniswapV2
                - UniswapV3
                zid: '0x111111111111111111111111'
        '400':
          description: 400 error response
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/INPUT_INVALID'
        '500':
          description: 500 error response
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/INTERNAL_SERVER_ERROR'
                - $ref: '#/components/schemas/UNCATEGORIZED'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    INPUT_INVALID:
      type: object
      properties:
        name:
          type: string
          enum:
          - INPUT_INVALID
        message:
          type: string
        data:
          type: object
          properties:
            zid:
              type: string
              description: The unique ZeroEx identifier of the request
            details:
              type: array
              items:
                type: object
                properties:
                  field:
                    type: string
                    description: The input field name
                  reason:
                    type: string
                    description: The validation failure reason
                required:
                - field
                - reason
                additionalProperties: false
              description: The list of invalid inputs
          required:
          - zid
          - details
          additionalProperties: false
      required:
      - name
      - message
      - data
      additionalProperties: false
    UNCATEGORIZED:
      type: object
      properties:
        name:
          type: string
          enum:
          - UNCATEGORIZED
        message:
          type: string
        data:
          type: object
          properties:
            zid:
              type: string
              description: The unique ZeroEx identifier of the request
          required:
          - zid
          additionalProperties: false
      required:
      - name
      - message
      - data
      additionalProperties: false
    INTERNAL_SERVER_ERROR:
      type: object
      properties:
        name:
          type: string
          enum:
          - INTERNAL_SERVER_ERROR
        message:
          type: string
        data:
          type: object
          properties:
            zid:
              type: string
              description: The unique ZeroEx identifier of the request
          required:
          - zid
          additionalProperties: false
      required:
      - name
      - message
      - data
      additionalProperties: false
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: 0x-api-key