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PubChem Compound Lookup
x402
PubChem Compound Lookup is a paid API for AI agents from bio.memoryapi.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Retrieves drug and chemical compound data from PubChem (NIH), including CID, IUPAC name, molecular formula, molecular weight, SMILES, InChI, description, and synonyms.
Price / call$0.005
Success—
StatusUnknown
How this service works
Biomedical drug and compound data API with x402 micropayments. Powered by PubChem (NIH), OpenFDA, and ChEMBL (EMBL-EBI).
Output
Returns structured compound data from PubChem including the PubChem CID, IUPAC name, molecular formula, molecular weight, canonical SMILES, InChI string, a text description of the compound, and a list of known synonyms.
Example use cases
Example prompt
“Can you look up the PubChem compound data for ibuprofen — I need the CID, molecular formula, molecular weight, SMILES, and IUPAC name?”
Technical details
Endpoint
GEThttps://bio.memoryapi.org/x402/bio/compoundWhen to prefer
Use this endpoint when you need structured chemical or pharmaceutical compound data (CID, SMILES, InChI, molecular weight, IUPAC name) sourced directly from NIH's PubChem database. Prefer this over general web search when you need machine-readable chemical identifiers and properties for a known drug or compound name.
Side effects
- Compound name not found in PubChem — returns empty result or 404
- Ambiguous compound name matching multiple CIDs — may return primary match only
- Payment of $0.005 USDC not provided or failed — returns 402 Payment Required
- Rate limiting or upstream PubChem API downtime — returns 503 or timeout
Input
{
"name": "aspirin",
"type": "label"
}Output
{
"cid": 2244,
"name": "aspirin",
"inchi": "InChI=1S/C9H8O4/c1-6(10)13-8-5-3-2-4-7(8)9(11)12/h2-5H,1H3,(H,11,12)",
"smiles": null,
"source": "PubChem / NIH",
"formula": "C9H8O4",
"success": true,
"synonyms": [],
"source_url": "https://pubchem.ncbi.nlm.nih.gov/compound/2244",
"description": "Aspirin can cause developmental toxicity and female reproductive toxicity according to an independent committee of scientific and health experts.",
"molecular_weight": "180.16"
}Schema · Response
{
"example": {
"cid": 2244,
"name": "aspirin",
"smiles": "CC(=O)Oc1ccccc1C(=O)O",
"source": "PubChem / NIH",
"formula": "C9H8O4",
"success": true,
"molecular_weight": "180.16"
}
}Tags
x402
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