{"uid":"cap_eQpRnejawpYuxhRdpKyVQ","slug":"ncbi-nlm-catalog-e-search-da572e36","name":"NCBI NLM Catalog E-Search","description":"Search the NCBI NLM Catalog journal/resource database and return matching UIDs for query {q} via E-utilities. Query: ?q= Returns JSON.","url":"https://clonecho.builda.company/x402/s/ncbi-esearch-nlmcatalog","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_bWKpFP0FkopaXNMRvHQB9","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 NLM Catalog journal and resource database and returns matching UIDs for a given query using NCBI E-utilities.","exampleAgentPrompt":"Search the NCBI NLM Catalog for journals matching 'nature medicine' and give me the UIDs.","exampleUseCases":null,"resultDescription":"A JSON response containing a list of NLM Catalog UIDs (record identifiers) that match the search query, retrieved via NCBI E-utilities.","failureModes":["Empty result set if no journals match the query","Payment failure (402) if USDC not provided","Malformed query returns error or empty UID list","NCBI API rate limits or downtime causing timeouts"],"whenToPreferThis":"Use this endpoint when you need to look up NLM Catalog UIDs for biomedical journals or resources by name or keyword, particularly as a first step in an NCBI E-utilities workflow (e.g., before fetching full records via EFetch). Prefer this over direct NCBI API calls when you need a pay-per-use, proxied access point to NLM Catalog search.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T01:01:48.801Z","isFirstParty":false}