0x

0x Cross-Chain API

Cross-Chain API endpoints

GitHub OpenAPI

Operations 5

GET /cross-chain/quotes Get Cross-Chain Quotes #
GET /cross-chain/status Get Gasless Trade Status #
GET /cross-chain/sources List Bridge Sources #
GET /cross-chain/tx-history-beta Get Cross-Chain Transaction History #
GET /cross-chain/quotes/stream Stream Cross-Chain Quotes #

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-cross-chain-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
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/0x/refs/heads/main/apis.yml

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OpenAPI Specification

0x-cross-chain-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: 0x Cross Chain API
  description: This is the official API reference for the 0x Cross-Chain API (v1).
  version: v1
  x-source-url: https://github.com/0xProject/0x-docs/blob/main/fern/openapi-cross-chain.json
  x-last-validated: '2026-05-28'
servers:
- url: https://api.0x.org
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/0x/refs/heads/main/openapi/0x-cross-chain-api-openapi.yml