Trade
GET /v1/quote finds the best route across every venue on the chain, splitting the order when that improves the output. POST /v1/swap turns it into a transaction you sign yourself. Chord never holds funds or keys.
Build on Chord
Best-route quotes and unsigned transactions for trading. Swaps on Ethereum, Arbitrum, Base, BNB Chain, Avalanche, Monad, Arc, Robinhood Chain and Solana, rolled up by token, venue and hour. Wallet PnL, liquidity positions and an analyst agent. One REST base URL, no key to read.
Read
Swaps on nine chains from Chord’s own index: chain totals, every token traded and wallet PnL on all of them; launches, holders, top wallets, liquidity pools and positions where the chain has them (GET /v1/chains says which). Answers carry their own coverage flags.
Stream
A public WebSocket for live candles, trade tapes and Arc prices, and a server-sent events feed for Robinhood Chain prices. No key, automatic reconnect.
Agents
The same API as an MCP server and a function-calling manifest, plus the analyst: ask a question in plain language and get a researched answer over the index, with a route card when the question implies a trade.
Where to start
Section titled “Where to start”Get startedAn API key (optional), your first request, and the three-call swap.
Add Chord to your appPatterns that hold across every endpoint: chains, amounts, coverage, caching, errors.
RecipesA token page, a markets board, a swap, charts, a trader dashboard, an LP dashboard, a launch feed, a bridge.
NetworksEthereum, Arbitrum, Base, BNB Chain, Avalanche, Monad, Arc, Robinhood Chain and Solana: ids, anchors, contracts, venues.
AgentsMCP server, function-calling manifest, the Ask agent API and llms.txt.
API referenceEvery endpoint with parameters, response schemas and real examples, generated from the OpenAPI document.
The base URL
Section titled “The base URL”https://api.getchord.xyz/v1Reads need no key at 60 requests a minute per IP. A key from getchord.xyz/developer raises that to your plan and meters usage per key. The whole contract is one file: openapi.json.