# arb-dex-mcp [Health: Active] **Category:** ๐Ÿ’ป Developer Tools **Repository:** https://github.com/donnywin85/arb-dex-mcp **GitHub Stars:** 1 **Views:** 0 **Installs:** 0 **Upvotes:** 0 **Directory Page:** https://allmcps.com/mcp/arb-dex-mcp ## Description Live cross-DEX pool prices, liquidity and spreads on 6 EVM chains, read from on-chain pool state. ## Claude Desktop Quick Installation Install path detected from listing signals. Uses `npx` (confidence: high): ```json "mcpServers": { "arb-dex-mcp": { "command": "npx", "args": ["-y","arb-dex-mcp"] } } ``` ## Documentation & README # arb-dex-mcp **Live cross-DEX crypto prices for your AI agent** โ€” per-venue pool price, pool liquidity and the gross cross-venue spread on 6 EVM chains, read straight from on-chain pool state. [![npm](https://img.shields.io/npm/v/arb-dex-mcp)](https://www.npmjs.com/package/arb-dex-mcp) [![npm downloads](https://img.shields.io/npm/dw/arb-dex-mcp)](https://www.npmjs.com/package/arb-dex-mcp) [![provenance](https://img.shields.io/badge/npm-provenance-brightgreen)](https://www.npmjs.com/package/arb-dex-mcp#provenance) [![MCP Registry](https://img.shields.io/badge/MCP%20Registry-io.github.donnywin85%2Farb--dex--mcp-blue)](https://registry.modelcontextprotocol.io/v0/servers?search=arb-dex) [![Indexed on TensorBlock MCP Index](https://mcp-index.tensorblock.co/v1/servers/github-donnywin85-arb-dex-mcp-7dd9a70c/badge.svg)](https://www.tensorblock.co/mcp/servers/github-donnywin85-arb-dex-mcp-7dd9a70c) [![Listed on mcpservers.org](https://mcpservers.org/badge.svg)](https://mcpservers.org/servers/donnywin85/arb-dex-mcp) [![license](https://img.shields.io/npm/l/arb-dex-mcp)](LICENSE) Chains: **BSC ยท Polygon ยท Arbitrum ยท Base ยท Avalanche ยท Optimism**. Venues: PancakeSwap (v2 + v3), Uniswap v3, SushiSwap, QuickSwap, Biswap, ApeSwap, BaseSwap, Trader Joe, Pangolin โ€” every v2-style pool **and every v3 fee tier separately**, because a $12k 1% pool and a $19M 0.01% pool are not the same quote. Nothing is modelled, estimated or backfilled. Every payload states its own block number and carries its own scope note, so an agent that quotes a figure also has the caveats attached to it. **Works with no API key** against a free hourly public snapshot. [Docs](https://donnywin85.github.io/arb-dex-mcp/) ยท [npm](https://www.npmjs.com/package/arb-dex-mcp) --- ## Quickstart Nothing to clone or build. Your MCP client fetches the package. Requires Node 18+. ### Claude Desktop `claude_desktop_config.json` โ€” macOS `~/Library/Application Support/Claude/`, Windows `%APPDATA%\Claude\`: ```json { "mcpServers": { "arb-dex": { "command": "npx", "args": ["-y", "arb-dex-mcp"], "env": { "RAPIDAPI_KEY": "your-rapidapi-key-here" } } } } ``` Restart Claude Desktop; the six tools appear under the connectors icon. **Drop the `env` block entirely to run keyless** โ€” the server still starts and the free-snapshot tools still answer. ### Claude Code ```bash claude mcp add arb-dex --env RAPIDAPI_KEY=your-rapidapi-key-here -- npx -y arb-dex-mcp ``` Keyless: ```bash claude mcp add arb-dex -- npx -y arb-dex-mcp ``` Then `/mcp` to confirm it connected. ### Cursor `~/.cursor/mcp.json` (global) or `.cursor/mcp.json` (per project): ```json { "mcpServers": { "arb-dex": { "command": "npx", "args": ["-y", "arb-dex-mcp"], "env": { "RAPIDAPI_KEY": "your-rapidapi-key-here" } } } } ``` Cursor โ†’ Settings โ†’ MCP shows the server and its tools once the file is saved. ### Any other MCP client Same three facts: command `npx`, args `["-y", "arb-dex-mcp"]`, transport **stdio**, optional env `RAPIDAPI_KEY`. --- ## Try it Real prompts, and the real shape that comes back. Payloads below were measured live on **2026-08-15**; they are trimmed for width but nothing is invented. ### 1. "What is WBNB/USDT trading at on every BSC venue right now?" `get_prices` reads every pool holding the pair โ€” v2 pairs and each v3 fee tier separately โ€” at one stated block: ```json { "pair": "WBNB/USDT", "network": "bsc", "chainId": 56, "blockNumber": 116151268, "pricesByVenue": [ { "venue": "pancake", "surface": "v2", "feeBps": 25, "price": 611.7347, "tvlUsd": 56834814.36 }, { "venue": "biswap", "surface": "v2", "feeBps": 10, "price": 610.8278, "tvlUsd": 415733.94 }, { "venue": "apeswap", "surface": "v2", "feeBps": 20, "price": 611.1244, "tvlUsd": 3659.06 }, { "venue": "pancakeV3:1", "surface": "v3", "feeBps": 1, "price": 610.5684, "tvlUsd": 18596810.32 }, { "venue": "pancakeV3:5", "surface": "v3", "feeBps": 5, "price": 610.6531, "tvlUsd": 4941099.44 }, { "venue": "pancakeV3:25", "surface": "v3", "feeBps": 25, "price": 610.6304, "tvlUsd": 52534.35 }, { "venue": "pancakeV3:100", "surface": "v3", "feeBps": 100, "price": 609.1025, "tvlUsd": 12206.21 } ], "bestBuy": { "venue": "pancakeV3:100", "price": 609.1025 }, "bestSell": { "venue": "pancake", "price": 611.7347 }, "midSpreadBps": 43.22, "crossDex": { "grossSpreadBps": 0, "grossUsd": 0, "optimalInput": { "amount": 0, "token": "WBNB", "usd": 0 }, "buyVenue": "-", "sellVenue": "-" }, "liquidity": { "venues": 7, "totalTvlUsd": 80856857.67 }, "source": "rpc" } ``` **Read the two spread numbers against each other.** The raw mid spread is **43 bps** โ€” and the gross capturable spread is **0**. The 609.10 quote lives in a $12k pool; the size that would actually clear it moves the price past the gap before you get there. A tool that reported only the 43 bps would be handing an agent a number it cannot trade. This one reports both, and `optimalInput` is where the honesty lands. ### 2. "Show me the cross-DEX spreads on Base โ€” are any actually capturable?" `get_spreads` sweeps a whole chain and ranks by **gross USD at the optimal size**, not by headline basis points: ```json { "network": "base", "chainId": 8453, "scannedPairs": 11, "opportunities": [], "found": 0, "filters": { "minSpreadBps": 10, "minVenueTvlUsd": 1000, "minGrossUsd": 0.01, "limit": 5 }, "ranking": "gross USD at the optimal trade size, NOT raw spread โ€” a large spread with a tiny optimal size is not an opportunity", "scope": "GROSS cross-venue spread from live pool state, BEFORE gas, MEV and any slippage beyond the optimal size. Not a profit estimate and not trade advice. Venues below the liquidity floor are excluded because a spread against a dust pool is an artefact, not an opportunity.", "elapsedMs": 2847 } ``` **`found: 0` is a real answer and it is the common one.** Eleven pairs scanned, nothing cleared the floor. Venues under $1,000 TVL are dropped outright. When rows *do* come back, each carries `capturable`, `warning` and `shallowestSideTvlUsd` so a big basis-point number cannot mislead on its own. This tool will tell your agent there is nothing there โ€” which is the whole point of asking it. ### 3. "How much history does arb-dex actually have, and for which chains?" `get_history_summary` sizes the archive *before* you query it: ```json { "rows": 133, "rowsWithPairDetail": 103, "rowsByEra": { "digest-totals-only": 30, "top-list-pairs": 5, "full-sweep": 98 }, "pairsTracked": 107, "firstAt": "2026-08-10T17:35:09.355Z", "lastAt": "2026-08-15T20:54:34.417Z", "spanHours": 123.32, "chainsSeen": ["arbitrum", "avalanche", "base", "bsc", "optimism", "polygon"], "pairs": [ { "chain": "polygon", "pair": "WBTC/USDC", "observations": 103, "qualifiedObservations": 39 }, { "chain": "bsc", "pair": "BTCB/USDT", "observations": 99, "qualifiedObservations": 15 }, { "chain": "arbitrum", "pair": "ARB/USDC", "observations": 98, "qualifiedObservations": 0 } ] } ``` Coverage is only what was measured. A gap stays a gap โ€” `rowsByEra` says how much detail each era of rows carries, and `ARB/USDC` having 98 observations but **0 qualified** is the archive telling you that pair has never once cleared the spread floor. --- ## Tools | Tool | What it answers | Access | |---|---|---| | `get_chains` | Which chains are covered, their chain IDs, tokens and DEX venues | Any key ยท keyless returns the chain list only, and says so | | `get_pairs` | What is priceable on one chain: token universe, venues, pair syntax | Any key ยท keyless returns the measured subset, labelled as such | | `get_prices` | One pair's price at **every** venue holding a pool for it, plus reserves, TVL, fee tier and the cross-DEX spread | Any key | | `get_spreads` | A whole chain's cross-venue dislocations, ranked by gross USD at the optimal size | Any key for `live: true` ยท keyless serves the free hourly snapshot | | `get_history_summary` | What the measurement archive covers: rows, pairs tracked, chains seen, span, retention | Any key (free tier included) | | `get_history` | One pair's per-venue price/liquidity series and gross cross-venue spread over 24h / 7d / 30d | **PRO plan** โ€” see [Plans](#plans) | The two history tools read the service's own measurement archive, so they answer the question the live tools cannot: whether a dislocation *persisted* or was a single sample. Sampling is roughly hourly, and gaps are never interpolated or backfilled. Call `get_history_summary` first to see what span exists before asking for a window. ## What it will not do - **Spreads are gross** โ€” before gas, MEV and slippage beyond the optimal size. Not a profit estimate and not trade advice. - **It never fabricates a row.** Without a key, `get_chains`, `get_pairs` and `get_spreads` answer from the free public surface and each carries a `limitation` field naming exactly what a key would add. `get_prices`, `get_history_summary` and `get_history` return an explicit key-required error with the signup link rather than a thinner answer dressed up as a full one. - **It does not execute trades**, hold funds, or touch a wallet. It is read-only market data. - **This package ships no credentials of any kind.** The key is yours and stays in your config. ## Get a key The paid tools call the API through RapidAPI using **your own** key. 1. Subscribe โ€” there is a free tier: 2. Copy your `X-RapidAPI-Key` from the RapidAPI dashboard. 3. Put it in `RAPIDAPI_KEY` in the config above โ€” never in code, and never in a commit. ### Plans Five of the six tools work on the **free** tier. Only the per-pair history series is gated: | Plan | Adds | |---|---| | **BASIC** ($0) | Live quotes on every chain, plus `get_history_summary` so you can size the archive before you buy it | | **PRO** ($15/mo) | `get_history` โ€” the measured per-venue series for one pair, 24h window, 1000 calls/mo | | **ULTRA** ($49/mo) | No window limit and no history meter, plus depth/slippage and spread alerts | | **MEGA** ($149/mo) | Bulk paging over the complete archive for your own store | Calling `get_history` below PRO returns an explicit `tier_required` error naming the plan and the upgrade URL โ€” it does not fail silently or return an empty series. ## Configuration | Env var | Default | Purpose | |---|---|---| | `RAPIDAPI_KEY` | โ€” | Your RapidAPI key. Required for the paid tools. | | `ARB_DEX_TIMEOUT_MS` | `45000` | Request timeout. A live full-chain sweep is a real on-chain read and can take ~30s. | | `ARB_DEX_FREE_BASE_URL` | production origin | Override the free-surface host. | | `ARB_DEX_RAPIDAPI_HOST` | `multi-chain-dex-prices-liquidity.p.rapidapi.com` | Override the RapidAPI host. | Set these in your MCP client's `env` block (see the configs above). `.env.example` ships in the package and documents the same variables for local runs from a clone. ## Test The test suite is not in the npm tarball โ€” run it from a clone: ```bash git clone https://github.com/donnywin85/arb-dex-mcp.git cd arb-dex-mcp && npm install npm run selftest # keyless: exercises the free fallbacks RAPIDAPI_KEY=... npm run selftest # keyed: exercises the paid routes ``` The test spawns the server over stdio and calls every tool against the **real production API** โ€” nothing is mocked. It asserts on live values (block number, per-venue prices, scanned-pair counts), so a run that passes is evidence the data path works end to end. ## Links - npm: - Docs: - Official MCP Registry: `io.github.donnywin85/arb-dex-mcp` - TensorBlock MCP Index: - Source: - The API behind it: ## License MIT โ€” see [LICENSE](https://github.com/donnywin85/arb-dex-mcp/blob/HEAD/LICENSE).