Relay MCP Server
A Model Context Protocol (MCP) server for Relay Protocol — cross-chain bridge and swap tools for AI agents.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
check_chain_statusCheck if a chain is healthy, view available solver liquidity, solver wallet addresses, depository contracts, and optionally check route configuration between two chains. Use this before quoting to verify a route is viable: - Is the chain healthy and operational? - How much solver liquidity is avail…
convert_amountConvert between human-readable token amounts and smallest-unit values (wei, lamports, satoshis). Use this before calling quote/bridge/swap tools which require amounts in smallest units. Examples: - 1.5 ETH (18 decimals) → "1500000000000000000" - 100 USDC (6 decimals) → "100000000" - 0.001 BTC (8 d…
estimate_feesexecute_api_callCall any public Relay API endpoint with full parameters and get the raw, unfiltered response. Use get_api_schema first to discover endpoints and their parameter schemas, then use this tool to call them. This gives you access to all API features that the dedicated tools simplify away — for example: …
get_api_schemaDiscover Relay API endpoints and their schemas. Two modes: 1. No arguments → lists all public endpoints (method, path, summary). 2. With endpoint → shows detailed parameter and response schemas. Use this to explore what the API offers before calling other tools.
get_app_feesCheck claimable app fee balances and past claim history for an integrator wallet. Use this to answer "how much have I earned?" or "what fees are claimable?" App fees are earned by integrators who route swaps/bridges through Relay with a referral fee configured. Returns both current claimable balan…
get_bridge_quoteget_multi_input_quoteget_relay_app_urlGenerate a deep link to the Relay web app with pre-filled bridge/swap parameters. The user can open this URL in their browser to START a new transaction via the Relay UI. This is NOT a transaction tracking URL — do NOT use it to check on an in-progress transaction. For tracking, use get_transaction_…
get_supported_chainsList all blockchain networks supported by Relay for bridging and swapping. Returns chain IDs, names, native currencies, and status. Use this to resolve chain names to chain IDs before calling other tools.
get_supported_tokensSearch for tokens supported by Relay across chains. Use this to find token contract addresses before getting quotes. Returns token symbol, name, address, and chain availability.
get_swap_quoteget_swap_sourcesList all DEX aggregators and AMMs that Relay routes swaps through (e.g. Uniswap, Jupiter, SushiSwap). Use this to answer "what DEX sources does Relay support?" or to verify which protocols are available for swap routing. No parameters needed.
get_token_detailsGet detailed information about a token: price, market cap, volume, liquidity, and optionally a price chart. For just the USD price, use get_token_price instead — it's faster and simpler. For trending tokens (discovery), use get_trending_tokens first, then this tool for deep-dives. When includeChar…
get_token_priceGet the current USD price of a token on a specific chain. For just the price, use this tool. For full fundamentals (marketCap, volume, liquidity, chart), use get_token_details instead. For fee estimates on a specific bridge/swap route, use estimate_fees — this tool is for standalone token pricing …
get_transaction_historyGet past Relay bridge and swap transactions for a wallet address. Returns transaction IDs, statuses, chains, and timestamps. Supports pagination via cursor. Filter by time range, origin/destination chain, or deposit address to narrow results.
get_transaction_statusCheck the status of a Relay bridge or swap transaction. Returns rich data including fees, token amounts, fail reasons, and route details. Accepts either a requestId (from a previous quote/execution) or a txHash (on-chain transaction hash) to look up the request. Note: Quotes expire in ~30 seconds.…
get_trending_tokensList currently trending tokens across Relay-supported chains. Returns token identities only (symbol, name, address, chainId) — NOT prices or volumes. To get pricing for a trending token, follow up with get_token_price or get_token_details. Use this to answer "what tokens are trending?" or "what's …
get_user_balanceCheck a user's balance for a specific token on a route. Returns how much of the token the user holds on the origin chain and the maximum amount they can bridge/swap on this route. Use this before quoting to verify the user has sufficient funds, or to show available balance context. Requires specify…
index_transactionTell Relay to index a transaction it may have missed. Use this when a bridge or swap transaction exists on-chain but doesn't appear in Relay's system (e.g. get_transaction_status returns "not found"). This is a write operation — it tells Relay's indexer to look at a specific transaction. The respon…
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
BASE_URLMCP_TRANSPORTRELAY_API_KEYOptional API key for higher rate limitsRELAY_API_URLPORTRELAY_APP_URLTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
20/20 tools missing one or more hints — check_chain_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); convert_amount (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); estimate_fees (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +17 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
Only 6/20 tool handlers declare input schemas (30%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
19/20 tool handlers wrap calls in try/catch (95%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.10.1 (high), @modelcontextprotocol/sdk@1.10.1 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
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