{"uid":"cap_MQalaa_w1PCXjWiEJgiJs","slug":"ncbi-protein-database-search-via-e-utilities-f82002ba","name":"NCBI Protein Database Search via E-utilities","description":"Search the NCBI Protein database and return matching UIDs for query {q} via E-utilities. Query: ?q= Returns JSON.","url":"https://clonecho.builda.company/x402/s/ncbi-esearch-protein","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_s1LA-AtfcIc4N85w5UpWf","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Searches the NCBI Protein database using E-utilities and returns matching UIDs for a given query string","exampleAgentPrompt":"Search the NCBI Protein database for 'human insulin receptor' and give me the matching UIDs.","exampleUseCases":null,"resultDescription":"A JSON response containing NCBI UIDs (numeric identifiers) for protein records matching the query, along with metadata such as the total result count — suitable for further lookup in NCBI databases like fetching full sequence records.","failureModes":["Empty result set if the query matches no protein records","Malformed or overly broad query returning thousands of UIDs with no filtering","NCBI E-utilities rate limiting causing delayed or failed responses","Invalid query syntax returning an error from upstream NCBI API","Network timeout if NCBI is temporarily unavailable"],"whenToPreferThis":"Use this endpoint when you need to programmatically search NCBI's Protein database and retrieve UIDs for downstream bioinformatics workflows, such as fetching protein sequences, annotations, or cross-referencing with other biological databases. Prefer this over direct NCBI API access when you want a metered, x402-payment-gated wrapper that abstracts credential management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:08:53.707Z","isFirstParty":false}