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NCBI PubChem Substance E-Search
x402
NCBI PubChem Substance E-Search is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Search the NCBI PubChem Substance database via E-utilities and return matching substance UIDs for a given query string
Price / call$0.02
Success—
StatusUnknown
How this service works
Search the NCBI PubChem Substance database and return matching UIDs for query {q} via E-utilities. Query: ?q= Returns JSON.
Output
A JSON response containing a list of PubChem Substance UIDs (SIDs) that match the submitted query string, as returned by the NCBI E-utilities esearch endpoint for the pcsubstance database.
Example use cases
Example prompt
“Search the NCBI PubChem Substance database for 'ibuprofen' and give me the matching substance UIDs.”
Technical details
Endpoint
POSThttps://clonecho.builda.company/x402/s/ncbi-esearch-pcsubstanceWhen to prefer
Use this endpoint when you need to programmatically search the NCBI PubChem Substance database by name, synonym, or keyword and retrieve matching Substance UIDs (SIDs) for further lookups or cross-referencing in chemical or biomedical workflows. Prefer this over general web search when structured, authoritative chemical substance identifiers from NCBI are required.
Side effects
- Empty result set if the query string does not match any PubChem Substance records
- Invalid or malformed query string may return an error or empty result
- NCBI E-utilities rate limiting or downtime causing upstream failures
- Missing required q parameter returns an error
Tags
x402
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