0x

aid: 0x
url: https://raw.githubusercontent.com/api-evangelist/0x/refs/heads/main/apis.yml
name: 0x
kind: company
description: '0x is the institutional-grade DEX aggregation and crypto liquidity infrastructure platform that powers token
  swaps inside hundreds of consumer wallets, exchanges, and onchain apps. The 0x API surface aggregates 150+ liquidity sources
  — public AMMs and exclusive professional market makers — across 20+ EVM chains, exposing four primary products: the Swap
  API (AllowanceHolder and Permit2 flows) for on-chain swaps, the Gasless API for swaps with no native gas token, the Cross-Chain
  API for any-token any-chain bridging across 16+ providers, and the Trade Analytics API for monetisation and reporting. Settlement
  is performed by the 0x Settler smart contracts using the Permit2 standard, and integrators get a unified API key, a TypeScript
  SDK, an official Agent Skill, and an MCP server for AI-assisted development.'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Cryptocurrency
- DeFi
- DEX Aggregator
- Swap
- Gasless
- Cross-Chain
- Permit2
- Liquidity
- Trade Analytics
- Web3
- Settlement
- Smart Contracts
created: '2026-05-28'
modified: '2026-05-30'
specificationVersion: '0.20'
x-source: public-apis/public-apis
x-category: Cryptocurrency
x-tier: 1
x-type: company
apis:
- aid: 0x:swap-api
  name: 0x Swap API
  description: 'Institutional-grade DEX aggregation API that returns indicative prices and firm quotes plus ready-to-sign
    transaction calldata for token swaps across 150+ liquidity sources on 20+ supported EVM chains. Supports two allowance
    models: the simple AllowanceHolder pattern (recommended, multisig-friendly) and the gas-optimised Permit2 pattern with
    EIP-712 signing.'
  humanURL: https://0x.org/products/swap
  baseURL: https://api.0x.org
  tags:
  - Swap
  - DEX Aggregation
  - Permit2
  - AllowanceHolder
  - Liquidity
  properties:
  - type: Documentation
    url: https://docs.0x.org/0x-swap-api/introduction
  - type: OpenAPI
    url: openapi/0x-api.yaml
  - type: Signup
    url: https://dashboard.0x.org/create-account
  - type: SDKs
    title: TypeScript SDK (OpenAPI-generated)
    url: https://github.com/0xProject/0x-swap-ts-sdk-migration
  - type: CodeExamples
    title: Swap v2 AllowanceHolder Headless Example
    url: https://github.com/0xProject/0x-examples/tree/main/swap-v2-allowance-holder-headless-example
  - type: CodeExamples
    title: Swap v2 Permit2 Headless Example
    url: https://github.com/0xProject/0x-examples/tree/main/swap-v2-permit2-headless-example
  - type: CodeExamples
    title: Swap v2 AllowanceHolder Next.js App
    url: https://github.com/0xProject/0x-examples/tree/main/swap-v2-allowance-holder-next-app
  - type: CodeExamples
    title: Swap v2 Permit2 Next.js App
    url: https://github.com/0xProject/0x-examples/tree/main/swap-v2-permit2-next-app
  - type: CodeExamples
    title: Swap v2 with Foundry
    url: https://github.com/0xProject/0x-examples/tree/main/swap-v2-with-foundry
  - type: Tutorials
    title: Swap Tokens with 0x Swap API
    url: https://docs.0x.org/0x-swap-api/guides/swap-tokens-with-0x-swap-api
- aid: 0x:gasless-api
  name: 0x Gasless API
  description: Lets end users swap tokens without holding the chain's native gas asset (ETH, BNB, AVAX, etc.). Fees are deducted
    from the sell token via a meta-transaction signed off-chain (Permit2 EIP-712) and submitted by 0x relayers to the Settler
    contract. Includes endpoints for indicative price, firm quote, trade submission, status polling, and supported approval
    tokens.
  humanURL: https://0x.org/products/gasless
  baseURL: https://api.0x.org
  tags:
  - Gasless
  - Meta-Transactions
  - Permit2
  - Relay
  - Swap
  properties:
  - type: Documentation
    url: https://docs.0x.org/gasless-api/introduction
  - type: OpenAPI
    url: openapi/0x-api.yaml
  - type: Signup
    url: https://dashboard.0x.org/create-account
  - type: CodeExamples
    title: Gasless v2 Headless Example
    url: https://github.com/0xProject/0x-examples/tree/main/gasless-v2-headless-example
  - type: CodeExamples
    title: Gasless v2 ERC-4337 Smart Account
    url: https://github.com/0xProject/0x-examples/tree/main/gasless-v2-erc4337-smart-account
  - type: CodeExamples
    title: Gasless v2 Trading Bot
    url: https://github.com/0xProject/0x-examples/tree/main/gasless-v2-trading-bot
- aid: 0x:cross-chain-api
  name: 0x Cross-Chain API
  description: Any-token, any-chain bridging API (currently private beta) that returns cross-chain quotes, real-time streaming
    quote updates, transaction status, transaction history, and the list of supported bridge providers (Across V4, Relay,
    Bungee, CCIP, Squid Coral, NEAR Intents, OFT, Mayan, Circle CCTP, Arbitrum/Linea/Superchain canonical bridges, and HyperCore).
    Covers EVM chains plus Solana, HyperCore, and Tron.
  humanURL: https://0x.org/products/cross-chain
  baseURL: https://api.0x.org
  tags:
  - Cross-Chain
  - Bridging
  - Quotes
  - Streaming
  - Intents
  - Solana
  - HyperCore
  properties:
  - type: Documentation
    url: https://docs.0x.org/cross-chain-api/introduction
  - type: OpenAPI
    url: openapi/0x-cross-chain.yaml
  - type: Signup
    url: https://0x.org/products/cross-chain
  - type: CodeExamples
    title: Cross-Chain Headless Example
    url: https://github.com/0xProject/0x-examples/tree/main/cross-chain-headless-example
  - type: CodeExamples
    title: Cross-Chain Streaming Next.js App
    url: https://github.com/0xProject/0x-examples/tree/main/cross-chain-streaming-next-app
- aid: 0x:trade-analytics-api
  name: 0x Trade Analytics API
  description: Read-only API for retrieving the integrator's Swap and Gasless trade history with surplus, fees, taker, route,
    and per-trade settlement detail — used for monetisation reporting, accounting reconciliation, and dashboarding.
  humanURL: https://docs.0x.org/trade-analytics-api
  baseURL: https://api.0x.org
  tags:
  - Trade Analytics
  - Reporting
  - Monetization
  - Fees
  properties:
  - type: Documentation
    url: https://docs.0x.org/trade-analytics-api
  - type: OpenAPI
    url: openapi/0x-api.yaml
  - type: Signup
    url: https://dashboard.0x.org/create-account
- aid: 0x:sources-api
  name: 0x Sources API
  description: Lists the active aggregated liquidity sources (AMMs, RFQ market makers, private liquidity venues) currently
    routed against by the Swap and Gasless engines for a given chain.
  humanURL: https://docs.0x.org/api-reference
  baseURL: https://api.0x.org
  tags:
  - Liquidity
  - Sources
  - Reference
  properties:
  - type: Documentation
    url: https://docs.0x.org/api-reference
  - type: OpenAPI
    url: openapi/0x-api.yaml
common:
- type: Website
  url: https://0x.org
- type: Documentation
  url: https://docs.0x.org
- type: Portal
  url: https://dashboard.0x.org
- type: Signup
  url: https://dashboard.0x.org/create-account
- type: Pricing
  url: https://0x.org/pricing
- type: Blog
  url: https://0x.org/post
- type: GitHubOrganization
  url: https://github.com/0xProject
- type: Twitter
  url: https://x.com/0xProject
- type: HelpCenter
  url: https://help.0x.org
- type: StatusPage
  url: https://status.0x.org
- type: ChangeLog
  url: https://docs.0x.org/changelog
- type: Tools
  title: MCP Server
  url: https://docs.0x.org/_mcp/server
- type: Tools
  title: Claude Code Skill (0x-api)
  url: https://github.com/0xProject/0x-ai
- type: Tools
  title: 0x Parser (Transaction Parsing Library)
  url: https://github.com/0xProject/0x-parser
- type: Tools
  title: 0x Settler Smart Contracts
  url: https://github.com/0xProject/0x-settler
- type: CodeExamples
  title: 0x API Code Examples Collection
  url: https://github.com/0xProject/0x-examples
- type: SDKs
  title: '@0x/0x-parser (npm)'
  url: https://www.npmjs.com/package/@0x/0x-parser
- type: Tutorials
  title: Token Swap dApp Course
  url: https://github.com/0xProject/token-swap-dapp-course-code
- type: Tutorials
  title: Swap Demo Tutorial
  url: https://github.com/0xProject/swap-demo-tutorial
- type: SupportedChains
  url: https://docs.0x.org/introduction/supported-chains
- type: APIIssues
  url: https://docs.0x.org/introduction/api-issues
- type: FAQ
  url: https://docs.0x.org/introduction/faq
- type: Plans
  url: plans/0x-plans-pricing.yml
- type: RateLimits
  url: rate-limits/0x-rate-limits.yml
- type: FinOps
  url: finops/0x-finops.yml
- type: Spectral
  url: rules/0x-rules.yml
- type: Vocabulary
  url: vocabulary/0x-vocabulary.yml
- type: JSONLD
  url: json-ld/0x-context.jsonld
- type: Review
  title: Streaming Availability Review
  url: review.yml
integrations:
- name: Coinbase
- name: MetaMask
- name: Phantom
- name: Brave
- name: Rainbow Wallet
- name: Polygon
- name: DeFi Saver
- name: Matcha
- name: Ethereum
- name: Arbitrum
- name: Base
- name: Optimism
- name: BNB Smart Chain
- name: Avalanche
- name: Polygon
- name: Linea
- name: Scroll
- name: Berachain
- name: Abstract
- name: HyperEVM
- name: Ink
- name: Mantle
- name: Monad
- name: Plasma
- name: Sonic
- name: Tempo
- name: Unichain
- name: World Chain
- name: Solana
- name: HyperCore
- name: Tron
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com