{"uid":"cap_cXMpDW9m8VFFPZ3_gDGxK","slug":"propeller-rocks-evm-calldata-encoder-c65ad2f7","name":"propeller.rocks EVM Calldata Encoder","description":"Encode a function call (signature or abi + args) into EVM calldata","url":"https://propeller.rocks/encode/calldata","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_L9P71xueZlfkVHYpblE5p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Encodes a function call (given a signature or ABI plus arguments) into EVM-compatible calldata bytes","exampleAgentPrompt":"Encode the EVM calldata for a call to transfer(address,uint256) with recipient 0xAbCd1234... and amount 1000000000000000000 — give me the hex calldata I can paste into a raw transaction.","exampleUseCases":null,"resultDescription":"Returns ABI-encoded EVM calldata as a hex string representing the full function call, ready to be used as the data field in an Ethereum transaction or low-level contract call.","failureModes":["Invalid or malformed function signature returns an error","Mismatched argument types vs. signature returns encoding error","Missing required arguments causes a 400 bad request","ABI JSON is malformed or missing the function definition","Argument values that can't be coerced to the expected Solidity types fail with a type error","Payment not provided or insufficient balance returns a 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need to construct raw EVM calldata for a contract interaction and don't have a full Ethereum library (like ethers.js or web3.py) available in your agent environment. Ideal for lightweight agents that need to prepare transaction data for a smart contract call without spinning up a full SDK.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:46:28.901Z","isFirstParty":false}