{"uid":"cap_nGpDXFGomsIjaJNWvrC0S","slug":"nomos-eth-usd-value-assessment-api-d9b4be8c","name":"Nomos ETH/USD Value Assessment API","description":"Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.","url":"https://base-agent-preflight.bytoken2023.workers.dev/x402/v1/value/eth-usd","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"amount":{"type":"string","pattern":"^[0-9]+(?:\\.[0-9]{1,18})?$","description":"Optional positive decimal ETH amount. Defaults to 1."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"network":{"type":"string"},"product":{"type":"string"},"activity":{"type":"object"},"identity":{"type":"object"},"assessment":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","product":"nomos-value-eth-usd","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QxIgIltMOpJ-XAbaRqqtr","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current ETH/USD exchange rate with associated risk assessment, network metadata, and risk scoring via a pay-per-request preflight API.","exampleAgentPrompt":"What is the current ETH/USD price along with its risk score and any flags — I want to check it's safe before my agent uses it for a conversion calculation?","exampleUseCases":[{"title":"Pre-trade ETH price risk check","prompt":"Before my agent executes a swap, fetch the current ETH/USD price from Nomos and tell me the risk level and any flags so I know the rate looks clean."},{"title":"ETH portfolio valuation with safety score","prompt":"I have 3.5 ETH — what's its current USD value and is the price feed flagged as low risk right now?"},{"title":"Agent decision gate on ETH price","prompt":"My agent needs to decide whether to proceed with a payment — can you pull the current ETH/USD rate and confirm the risk score is low before it moves forward?"}],"resultDescription":"A JSON object containing the network identifier (e.g. eip155:8453 for Base), the product name ('nomos-value-eth-usd'), and an assessment object with a risk_score (numeric), risk_level (e.g. 'low'), and a flags array (empty when clean). Optionally includes activity, identity, and provenance objects depending on the request.","failureModes":["Invalid amount format (non-numeric or negative) returns 400 with validation error","Missing or failed x402 payment returns 402 Payment Required","Network or Cloudflare Worker downtime returns 503","Price feed unavailability may return 503 or a stale/error response","Malformed query parameter (e.g. amount with too many decimal places) returns 400"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a risk-assessed, network-aware ETH/USD price feed — particularly for preflight checks before on-chain transactions or agent-executed payments on Base. It is distinct from bare price APIs because it bundles a risk score and flags alongside the price, making it suitable for autonomous decision gates rather than just display.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:57:08.611Z","isFirstParty":false}