{"uid":"cap_OUuwH8oDek5HXQPCs8WGS","slug":"liminal-spot-prices-fx-rate-3211d15a","name":"Liminal Spot Prices – FX Rate","description":"Live crypto spot-price snapshots (USD) and fiat FX spot rates. Pay-per-request via x402 v2: $0.01 USDC on Base, Monad, Arbitrum, Optimism, Polygon, Avalanche or Solana (eip155:8453), Monad (eip155:143), Arbitrum (eip155:42161), Optimism (eip155:10), Polygon (eip155:137), Avalanche (eip155:43114) or Solana, scheme exact (EIP-3009). Unpaid calls return HTTP 402 with a base64 PAYMENT-REQUIRED header; retry with a PAYMENT-SIGNATURE header.","url":"https://x402-spot-prices.hsharmanov02.workers.dev/fx?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"to":"EUR","from":"USD","rate":0.9214,"as_of":1759099200,"source":"open.er-api.com","service":"fx-rate","inverse_rate":1.0853}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_R2oL9KbYKOLu_cyMKy1Y6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live fiat currency exchange rate snapshots (e.g. USD to EUR) sourced from open.er-api.com, paid per-request via x402 at $0.01 USDC.","exampleAgentPrompt":"What's the live spot exchange rate from USD to EUR right now? I need the current rate and its inverse.","exampleUseCases":[{"title":"Real-time invoice currency conversion","prompt":"My invoice is in USD but I need to display the amount in EUR for a European client — what's the current USD to EUR spot rate?"},{"title":"Travel budget FX check","prompt":"I'm budgeting a trip to Japan — what's the live exchange rate from USD to JPY right now?"},{"title":"Live FX rate feed for trading dashboard","prompt":"Fetch the current GBP to USD spot rate including the inverse rate so I can update my forex dashboard."}],"resultDescription":"A JSON object containing the source currency (from), target currency (to), the current spot exchange rate (rate), the inverse rate (inverse_rate), a Unix timestamp of when the rate was recorded (as_of), the data source (open.er-api.com), and the service identifier (fx-rate).","failureModes":["HTTP 402 returned with base64 PAYMENT-REQUIRED header if no payment signature is provided — must retry with PAYMENT-SIGNATURE header","Invalid or unsupported currency codes may return an error or empty response","Rate staleness if upstream open.er-api.com data is delayed","Network errors from the Cloudflare Worker host"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-use real-time fiat FX spot rate without a subscription, especially in x402-enabled agent pipelines on EVM-compatible chains or Solana. It is ideal for cost-sensitive agents that only occasionally need currency rates and want to avoid monthly API key commitments.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T18:35:42.185Z","isFirstParty":false,"canonicalSlug":"liminal-spot-prices-fx-rate-3211d15a"}