{"uid":"cap_fcPB_jOVr5GgePuC_mz0s","slug":"synthora-evm-chain-metadata-service-1b277d41","name":"SYNTHORA EVM Chain Metadata Service","description":"Chain metadata: chainId, latest block, gas price and finality across 5 EVM chains. Deterministic, Ed25519-signed.","url":"https://rpc-network.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"ok":true,"niche":"rpc-network","result":{"op":"network"}}},"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":"down","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_qkmjJPMjVvyCnAxeUFX76","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 chainId, latest block number, gas price, and finality status for a specified EVM chain, signed with Ed25519.","exampleAgentPrompt":"What's the current chainId, latest block, gas price, and finality status for Polygon right now — and give me a signed result I can trust?","exampleUseCases":null,"resultDescription":"Returns a deterministic, Ed25519-signed JSON payload containing chainId, latest block number, current gas price, and finality status for the requested EVM chain. Covers up to 5 EVM chains. First 3 calls per wallet are free (requires X-WALLET header); subsequent calls cost $0.001 USDC via x402 on Base. No charge is incurred on upstream failures.","failureModes":["Unsupported or unrecognized chain name returns an error","Missing or malformed X-WALLET header may prevent free-tier access","Upstream RPC node failure returns no charge but also no data","Invalid chain string format causes request rejection","Network timeout if target chain RPC is unreachable"],"whenToPreferThis":"Use this endpoint when you need cryptographically signed, deterministic chain metadata (chainId, block, gas, finality) across multiple EVM chains in a single call, especially when proof-of-integrity via Ed25519 signature is required. Prefer over raw RPC calls when you want a normalized multi-chain interface with transparent per-call pricing and free-tier access.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:36:27.667Z","isFirstParty":false}