{"uid":"cap_dmtpT7nrPB1juqrqnHz70","slug":"synthora-rpc-nonce-lookup-4de2ba8a","name":"SYNTHORA RPC Nonce Lookup","description":"Next pending nonce for an address via eth_getTransactionCount (pending). Deterministic, Ed25519-signed.","url":"https://rpc-nonce.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","required":["address"],"properties":{"chain":{"type":"string","description":"chain"},"address":{"type":"string","description":"address"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iD2bgrY623SXD3sY8P_qi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the next pending transaction nonce for an Ethereum address using eth_getTransactionCount (pending)","exampleAgentPrompt":"What's the next pending nonce for Ethereum address 0xAbCd1234... on Base so I can construct my next transaction?","exampleUseCases":null,"resultDescription":"Returns the pending nonce (transaction count) for the given address, cryptographically signed with Ed25519 for integrity, indicating the next sequence number to use for a new transaction on that chain.","failureModes":["Invalid or malformed Ethereum address returns an error with no charge","Upstream RPC node failure returns an error with no charge billed","Unsupported or invalid chain identifier results in an error response","Missing required fields (address or chain) causes a request validation error"],"whenToPreferThis":"Use this endpoint when you need to programmatically retrieve the pending nonce for an Ethereum-compatible address before constructing or signing a transaction, especially when you want Ed25519-signed deterministic responses for auditability, and when operating on chains supported by SYNTHORA's RPC infrastructure. The first 3 calls per wallet are free, making it useful for low-frequency or testing scenarios before committing USDC via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:39:15.286Z","isFirstParty":false}