check_approval
Check whether a wallet has the required token approval (Permit2 or router allowance) to swap a given amount on a chain. Returns the raw `/check_approval` response, with an `approval` key that is `null` when the wallet is good to go, or a transaction the caller must sign when an approval is needed. Pairs with `get_swap_quote`: an agent should call this before quoting so the approval path is known up front.
Check whether a wallet has the required token approval (Permit2 or router allowance) to swap a given amount on a chain. Returns the raw /check_approval response, with an approval key that is null when the wallet is good to go, or a transaction the caller must sign when an…
Input
The tool takes a single JSON object. Every field, its type, and an example are on the generated reference at GET /mcp/tools, under this tool's name.
Calling it
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": { "name": "check_approval", "arguments": {} }
}Put your arguments in place of the empty object. A call that fails comes back as a normal result carrying isError: true and a message naming what went wrong, not as a JSON-RPC protocol error.
The full request and response shape, and a live playground, live on the generated reference at GET /mcp/tools.
get_swap_quote
Get a swap quote from the Uniswap API. Translates the high-level `chain` argument to the numeric chain id the API expects, then POSTs to `/v1/quote` with the wallet, tokens, and amount. Returns the raw quote payload, including gas estimates, the route, and (for UniswapX routes) the Permit2 payload to sign before `/swap` is called. The most useful tool in the DeFi set: agents will call it before every swap.
get_swappable_tokens
List the destination bridge chains a given token on a given chain can be swapped or bridged into. The Uniswap API takes the source `tokenIn` and `tokenInChainId` as required query parameters and returns the destinations the source token is supported on. The integration spec for this subcategory described a `chain` / `includeCrossChain` shape, but the underlying API does not accept that shape; the tool follows the actual API contract so the response is real data, not a 400.