{"uid":"cap_mTCB6_zTE1vg97v8ykKLo","slug":"synthora-ecb-euro-area-10y-government-bond-spot-yield-c85485e0","name":"SYNTHORA ECB Euro-Area 10Y Government Bond Spot Yield","description":"Euro-area AAA-rated government bond 10-year spot yield from the ECB yield-curve dataflow via the SDMX Data Portal (keyless JSON, dataflow YC). Serves autonomous fixed-income agents and agent-to-agent bots benchmarking EUR long-end rates against US Treasury yields. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.","url":"https://ecb-euro-govt-yield-10y.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"format":{"type":"string","description":"format"},"series_key":{"type":"string","description":"series_key"},"lastNObservations":{"type":"string","description":"lastNObservations"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"ecb-euro-govt-yield-10y","result":{"2026-07-07":3.0568869592,"2026-07-08":3.1370395898,"2026-07-09":3.1292327833},"provenance":{"url":"https://data-api.ecb.europa.eu/service/data/YC/B.U2.EUR.4F.G_N_A.SV_C_YM.SR_10Y?lastNObservations=3&format=jsondata","source":"ECB Euro-Area 10Y Government Bond Spot Yield"}}},"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_zpNs6cXWzL1q3UiEAfqP_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves the ECB euro-area AAA-rated government bond 10-year spot yield from the ECB SDMX YC dataflow, returning dated yield observations in JSON format.","exampleAgentPrompt":"What's the ECB euro-area 10-year AAA government bond spot yield right now? Pull the last 3 observations in JSON so I can compare the EUR long-end rate to US Treasuries.","exampleUseCases":[{"title":"EUR vs US Treasury yield spread monitoring","prompt":"Can you fetch the latest 5 ECB euro-area 10-year government bond spot yield readings so I can calculate the current spread against US 10Y Treasuries?"},{"title":"Fixed-income agent daily rate briefing","prompt":"Pull today's ECB 10Y euro-area AAA sovereign bond spot yield and give me the last 10 daily observations so I can track the recent trend in EUR long-end rates."},{"title":"Automated bond portfolio benchmarking","prompt":"I need the ECB euro-area 10-year spot yield for the last 20 observations in JSON format to benchmark my EUR fixed-income portfolio's duration risk against the risk-free long rate."}],"resultDescription":"Returns a JSON object with a boolean 'ok' flag, a niche identifier ('ecb-euro-govt-yield-10y'), a 'result' map of ISO date strings to spot yield values (expressed as percentage rates, e.g. 3.056), and a 'provenance' object containing the source ECB SDMX API URL and source label. The number of date/yield pairs matches the lastNObservations parameter requested.","failureModes":["ECB SDMX upstream unavailable: returns error or non-200 response from ECB data portal","Invalid series_key: ECB returns no data or a 404/error for unrecognized series identifiers","lastNObservations set to 0 or non-numeric string: may return empty result set or upstream error","Unsupported format value: ECB may reject non-jsondata format strings","Payment failure (x402): call rejected before reaching ECB if USDC micropayment is not authorized","Stale data: ECB may not publish yield data on weekends or holidays, resulting in older observations"],"whenToPreferThis":"Choose this endpoint when you need the official ECB-sourced euro-area AAA government bond 10-year spot yield from the YC SDMX dataflow, particularly for fixed-income agents benchmarking EUR long-end rates, computing EUR/USD rate spreads, or building automated sovereign yield monitoring pipelines. Prefer it over general financial data APIs when ECB provenance and the specific YC series (B.U2.EUR.4F.G_N_A.SV_C_YM.SR_10Y) is required for compliance or transparency reasons. It is especially well-suited for agent-to-agent workflows where a verifiable, authoritative EUR risk-free rate source is needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:33:29.465Z","isFirstParty":false}