{"uid":"cap_Ta_6_Hs845THQmBMXf92N","slug":"particle-pro-bill-sponsors-405622a5","name":"Particle Pro Bill Sponsors","description":"List bill sponsors. Returns the primary sponsor and all cosponsors of a bill with congress member details.","url":"https://api.particle.pro/v1/congress/bills/:id/sponsors","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_XmBp8_mw3asrMJ94yY7Vk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the primary sponsor and all cosponsors of a specific bill, including congress member details.","exampleAgentPrompt":"Who are the primary sponsor and all cosponsors of bill HR-3684? I need their congress member details.","exampleUseCases":[{"title":"Track bill sponsorship for lobbying research","prompt":"Can you pull up all the sponsors and cosponsors for bill S-1260? I need to know which congress members are backing it and their details."},{"title":"Political alignment analysis for a bill","prompt":"Who sponsored and cosponsored the Infrastructure Investment and Jobs Act — I want to see which legislators are behind it and from which parties."},{"title":"Journalist researching legislative support","prompt":"I'm writing about HR-4521 — can you get me the full list of sponsors and cosponsors, including their congress member profiles?"}],"resultDescription":"A structured list containing the primary sponsor and all cosponsors of the specified bill, each entry including congress member details such as name, party, state, and role.","failureModes":["Invalid or non-existent bill ID returns a 404 or empty result","Bill ID format mismatch causes a bad request error","Payment not authorized results in a 402 payment required error","Rate limiting may cause temporary 429 errors","Bill exists but has no recorded cosponsors returns only the primary sponsor"],"whenToPreferThis":"Use this endpoint when you need to identify who in Congress is sponsoring or supporting a specific bill by its ID, especially when you need structured congress member metadata for each sponsor. Prefer this over general legislative search endpoints when you already have a bill ID and need sponsor attribution data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:57:02.219Z","isFirstParty":false}