RAVN

exchange.ravn由 ravn.exchange 发布官方发布者v1.0.3更新于 Oct 24, 2026

Cross-chain swap API for native Bitcoin, Solana and EVM chains. No API key, no custody.

已验证Streamable HTTP可网页运行金融开发者工具

概览

AI 生成的概览

RAVN 托管 MCP 服务器，让助手为 EVM 链、原生比特币和 Solana 之间的跨链兑换报价、生成执行载荷并跟踪状态。

可以做什么
  • 报价：获取同链或跨链兑换的最优报价，列出支持的链与代币，解析代币地址元数据，查询 BTC 目标代币覆盖情况和各场所健康状态。
  • 准备执行：把报价转换为可签名载荷（交易、签名或存款三种类型），并为存款路线生成可直接签名的比特币 PSBT。
  • 提交与跟踪：提交已收集的签名以下单，并轮询兑换状态直至最终结果。
适用场景
适合助手协助用户在链之间或生态之间转移代币（包括原生 BTC 与 SOL），且用户自行保管私钥并在本地签名。也适合构建代币选择列表，或在提议兑换前确认哪些路线当前可用。
运行要求
远程 streamable HTTP 端点 app.ravn.exchange；无需注册、API 密钥或付费即可开始。可选用免费密钥通过 x-api-key 提高速率上限。匿名使用限制为每 IP 每分钟 30 次请求，另加每分钟 120 次状态轮询。签名或发送载荷需要钱包。
安装前请注意
该服务器会生成真正动用资金的交易：输出必须由用户钱包签名或广播，存款路线需要把资产发送到指定地址。ERC-20 兑换可能需要先单独发送并确认 approve()，否则交易会回滚或静默无法成交。金额为最小单位的字符串。可选的集成方费用需按返回结果支付，并向 status 上报兑换才能获得结算。存在速率限制。

安装

在 SourceWeft 中

  1. 打开 控制台中的 RAVN，将其添加到工作区。
  2. 为需要使用其工具的对话启用该服务。

Web executable，通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

交给智能体安装

把这段提示词粘贴到 Claude Code、Codex、Cursor 等智能体，或 SourceWeft 对话中。智能体会读取该服务器的安装指南，先向你展示发布者、端点和登录方式，经你同意后再把它添加到你的客户端。密钥不会写进任何命令。

阅读 https://sourceweft.com/mcp/exchange.ravn%2Fravn/install.md，并按其中说明把这个 MCP 服务器接入我的客户端。修改任何配置之前，先告诉我它的发布者、端点和登录方式，等我确认。不要把 API 密钥写进命令或我会提交的文件；问我密钥应从哪里获取。

查看智能体所依据的安装指南

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。

{
  "mcpServers": {
    "ravn": {
      "type": "http",
      "url": "https://app.ravn.exchange/api/mcp"
    }
  }
}

README

RAVN examples

[smithery badge]

Working code for the RAVN cross-chain swap API — including native Bitcoin, not wrapped BTC.

One integration covers EVM chains, native Bitcoin and Solana. Every quote races every live execution venue in parallel and the best net output wins. RAVN takes 0 bps on every route. Non-custodial: RAVN never holds your funds and writes no smart contracts of its own.

No signup required to start. Every example below runs anonymously.

bash
git clone https://github.com/ravndex/ravn-examplescd ravn-examples && npm installnpm run health

The examples

What it shows
src/health.ts10-second smoke test — which venues are racing right now. Start here.
src/btc-out.tsUSDC on Base → native BTC, end to end on the SDK's executeAndTrack, fee and status reporting included. The one most swap APIs can't do. Dry-runs without a wallet.
src/agent-swap.tsClaude tool-calling loop: the model picks the swap, your code keeps the keys.
src/x402-client.tsPay-per-call over x402 — no key, no account.
src/ravn.tsThe shared client: the official @ravnexchange/sdk (zero dependencies, typed) plus amount helpers.
MCP.mdPoint Claude or Cursor at the hosted MCP server. Three lines of config.

The contract

Four calls, always the same order.

POST /quote   → best route + an opaque quoteTokenPOST /execute → an execution payload tagged by executionType, with its own quoteToken                (+ submit-signature, when the type is SIGNATURE)POST /status  → pending → processing → success (or refunded / failed)

Poll /status with the quoteToken execute returned, its statusRef (else your swap's tx hash), and as txHash the hash of the fee payment you sent beside the swap, or on a two-step route (a statusRef came with a TRANSACTION) your swap's own tx hash, until the status is final. Use POST: a quoteToken can run to tens of kilobytes, and a large one in a GET query string fails.

Everything branches on one field:

ts
switch (execution.executionType) {  case "TRANSACTION": // sign and broadcast it yourself  case "SIGNATURE":   // sign typed data; RAVN submits it, no gas  case "DEPOSIT":     // send the input asset to an address}

The one thing that trips people up

An ERC-20 swap is really two transactions. Before any contract can move your tokens you must sign a separate on-chain permission — an approve(). TRANSACTION and SIGNATURE payloads carry that ready to send, as approval, whenever it's needed.

ts
if (execution.approval) {  const { to, data, value } = execution.approval;            // value is a decimal string  const hash = await wallet.sendTransaction({ to, data, value: BigInt(value) });  await client.waitForTransactionReceipt({ hash });   // MINED, not just broadcast}// …now send the swap

Broadcasting the swap before the allowance is mined reverts on transferFrom and the user eats the gas. On gasless venues (CoW, Bebop) it's quieter and worse: the order is accepted and simply never fills, with no error. Native-coin sells and DEPOSIT routes never carry approval.

RAVN reads your user's allowance on-chain at /execute and leaves approval out when it already covers the amount. When that read fails, approval is included anyway, so check the allowance for approval.spender yourself and skip it when it covers approval.amount (btc-out.ts does, through executeAndTrack's hasAllowance). RAVN's read sees the latest block only, so run one swap per token and spender at a time. An approval.reset (Ethereum USDT holding a partial allowance) is an approve(spender, 0) to send and mine first; executeAndTrack does.

0x Gasless can also return approvalData: a second typed-data signature that approves the token gaslessly, sent to /submit-signature as approvalSignature. executeAndTrack signs it for you.

Collecting your fee

If your key sets a fee, a swap only pays you when you do two things:

  1. Pay execution.fee exactly as returned, when there is one (Rift, private swaps, Eco Routes, Layerswap, Mayan routes paying no referrer). EVM: send fee.transaction once the swap has succeeded, or batch an ERC-20 fee with it. Bitcoin: the fee is a second output of the deposit's own transaction. Solana: the transfer goes inside the deposit's own transaction.
  2. Report the swap to /status until it's final, with that fee payment's hash (on a two-step route, your swap's own hash) as txHash on every poll. On same-chain venues RAVN only learns a swap happened from your poll: never reported, never paid.

On a TRANSACTION, executeAndTrack pays the fee and hands you the hash to poll with (statusTxHash); from SDK 0.2.0 its own polling also runs through expired and not_found and retries a failed status call. A DEPOSIT it leaves to you: btc-out.ts sends the deposit and the fee, then polls them all through one loop. The full checklist: https://docs.ravn.exchange/collecting-your-fee

unlimitedRecommended: true (CoW) means the venue would rather you approve once for a large amount than pay approval gas on every swap. data still encodes the exact amount; raising it is your call.

Amounts

Always strings, always the token's smallest unit — wei, lamports, satoshis. Never floats. toBaseUnits() / fromBaseUnits() in src/ravn.ts convert safely.

Cross-ecosystem swaps

Selling on EVM and receiving BTC or SOL needs a destinationAddress — the payout chain has no idea what your EVM address is.

Rate limits

No key30 req/min per IP, plus 120 /status polls/min
Free key, instant, no review120 req/min, plus 480 /status polls/min

Status polls have a budget of their own (4× your limit). Every rate-limited response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset (epoch seconds), and a 429 adds Retry-After. Pass your key as x-api-key. CORS is enabled on every endpoint, so browser-side dapps and wallet widgets can call the API directly with no server-side proxy.

Errors

Branch on the stable code, never the message.

INVALID_REQUEST (an unsupported chain is one of these) · UNSUPPORTED_TOKEN · NO_LIQUIDITY · QUOTE_EXPIRED · QUOTE_INVALID · QUOTE_NOT_EXECUTABLE · BUILD_FAILED · ORDER_REJECTED · VENUE_RATE_LIMITED · RATE_LIMITED · UNAUTHORIZED · UNAVAILABLE · NOT_FOUND · NOT_CONFIGURED · INTERNAL. The SDK adds NETWORK_ERROR when no response came back at all. Full table: https://docs.ravn.exchange/errors

Every response carries x-request-id. Quote it if you report a bad quote — it's how we find it.

Links

MIT licensed. Issues and PRs welcome.

来源：README.md，提交 56ceac9

工具

10

ravn_quote

Get a RAVN swap quote

Get a swap quote from RAVN — same-chain or cross-chain, across 18 chains including native (non-wrapped) Bitcoin and Solana as source or destination. Free, no API key or payment required. Returns a quoteToken; pass it to ravn_execute to get a signable/broadcastable execution payload.

输入参数apiKeytimeoutMsinputToken必填onlyVenuesinputAmount必填outputToken必填rankingModeslippageBpsuserAddress必填confidentialinputChainId必填excludeVenues另有 4 个

ravn_execute

Execute a RAVN swap quote

Turn a quoteToken from ravn_quote into an execution payload. Returns one of three shapes (executionType): TRANSACTION (sign and broadcast yourself), SIGNATURE (sign, RAVN submits), or DEPOSIT (send the input asset to a given address). RAVN never takes custody of funds — you always sign or send from your own wallet. TRANSACTION and SIGNATURE may also include an `approval` — an ERC-20 approve() you must broadcast and wait to be MINED before the transaction/signature, or it fails (reverts on TRANSACTION; on SIGNATURE the order is accepted and silently never fills). Only present when the sold token needs it — omitted for native-coin sells and already-approved tokens. An `approval.reset` (Ethereum USDT holding a partial allowance) goes first, mined, then the approval. A result with `sandbox: true` is a test: send nothing from it.

输入参数apiKeyquoteToken必填refundAddressdestinationAddress

ravn_submit_signature

Submit a signed RAVN order

For a SIGNATURE-type ravn_execute result only: submit the signature(s) you collected (over typedData, and approvalData if present) to actually place the order. RAVN decodes the venue from quoteToken and routes to the right venue-specific submit path — you never touch a per-venue endpoint. Returns a statusRef — pass it to ravn_status as `ref` to poll this swap.

输入参数apiKeysignature必填quoteToken必填approvalSignature

ravn_status

Check RAVN swap status

Poll the status of a swap by its quoteToken and ref from ravn_execute (statusRef, deposit address, or origin tx hash). Use the quoteToken execute returned — compose rebinds hop 1 onto hop 2's deposit. Status is authoritative where the venue exposes it; a swap the venue can't track reports 'unknown' rather than a guess.

输入参数ref必填apiKeytxHashquoteToken必填

ravn_health

Check RAVN venue health

Liveness check across every venue RAVN routes through — call before a swap if you want to know whether a route is degraded ahead of time.

无需输入参数。

ravn_tokens

List RAVN's token registry for a chain

RAVN's own listed token registry for one chain — populate a token picker without hardcoding one. This is "what RAVN knows about and might route", not a per-pair routability guarantee for any specific pair; call ravn_quote to check that.

输入参数apiKeychainId必填

ravn_tokens_resolve

Resolve a token address to its metadata

Resolve an arbitrary token address to its metadata (symbol, name, decimals) via an on-chain read — for a paste-any-address flow, when the token isn't necessarily on ravn_tokens's list.

输入参数apiKeyaddress必填chainId必填

ravn_btc_coverage

Which tokens actually route from native Bitcoin

For a swap where native BTC is the source, not every token on the destination chain is reachable. Returns which of ravn_tokens's list on `chainId` a BTC venue can actually route to, and how many venues serve each, so you can build a token list that matches what will really quote instead of discovering it one NO_LIQUIDITY at a time. BTC-as-source only — selling a token INTO BTC isn't restricted the same way (nearly any token can be sold into BTC), so this has nothing useful to say about that direction.

输入参数apiKeychainId必填

ravn_chains

List every chain RAVN supports

Every chain RAVN lists a token registry for (see ravn_tokens). Static, doesn't change per request, safe to cache instead of hardcoding a chain table.

输入参数apiKey

ravn_btc_prepare_send

Prepare a signable Bitcoin transaction for a RAVN DEPOSIT

Turns a DEPOSIT-type ravn_execute result (deposit.address + deposit.amount) into a ready-to-sign PSBT, so you don't have to write your own UTXO selection and fee-estimation code. If that result also has a `fee` (an integrator fee RAVN collects beside the deposit), pass its fee.address as feeAddress and fee.amount as feeAmountSats: the PSBT then pays it as a second output of the same transaction, which is the only place RAVN looks for it. Fetches your UTXOs and the current network fee rate from mempool.space (public, no auth). RAVN never sees or touches a private key — sign the returned PSBT with your own wallet and broadcast it yourself. Only one signer is ever needed (unlike PSBT flows that require coordinating signatures across multiple UTXO-holding wallets), because every RAVN BTC-source venue resolves to a plain payment to the deposit address (plus RAVN's fee output, when there is one).

输入参数networktoAddress必填amountSats必填feeAddressfromAddress必填feeAmountSatsfeeRateSatsPerVb

版本历史

2
  1. v1.0.3最新Sep 25, 2026
  2. v1.0.2Sep 16, 2026

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