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-productions.s3.amazonaws.com/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: '2026-05-28'
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: SDK
        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: SDK
    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
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