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RCSB PDB Structure Lookup
x402
RCSB PDB Structure Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Retrieves detailed structural metadata for a Protein Data Bank entry by PDB ID, including title, experimental method, resolution, polymer chains, ligands, and citation links.
Price / call$0.002
Success—
StatusUnknown
How this service works
Protein Data Bank Structure (RCSB PDB). Protein Data Bank structure lookup by PDB id (4HHB): title, experimental method, resolution, release date, molecular weight, each polymer chain with organism and UniProt ids, bound ligands with formulas, primary citation (DOI, PubMed) and coordinate file links. RCSB PDB, CC0.
Output
Returns a structured JSON object containing the PDB entry's title, experimental method (e.g. X-ray crystallography, cryo-EM), resolution, release date, molecular weight, a list of polymer chains each annotated with organism and UniProt IDs, bound ligands with their chemical formulas, the primary citation with DOI and PubMed ID, and links to coordinate files.
Example use cases
Protein structure research lookup
“I'm studying hemoglobin — can you pull up the PDB entry 4HHB and give me the title, resolution, release date, and the UniProt IDs for each polymer chain?”
Ligand binding analysis
“For PDB structure 1ATP, what bound ligands are present and what are their chemical formulas? Also include the molecular weight and experimental method.”
Citation and coordinate file retrieval
“I need the primary citation DOI and PubMed ID for PDB entry 6VXX, plus the coordinate file download links so I can run a molecular dynamics simulation.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/bio/pdb/:pdb_id?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need comprehensive structural metadata for a specific PDB entry in a single call, including chain-level organism/UniProt annotations and ligand details. Prefer this over directly querying RCSB PDB APIs when you need a simple, agent-friendly interface with per-call micropayment pricing and no API key management.
Side effects
- Invalid or nonexistent PDB ID returns a 404 or empty result
- Malformed PDB ID format (not 4 alphanumeric characters) may return a validation error
- Upstream RCSB PDB service outage causes timeout or 502 error
- Payment failure (insufficient USDC) blocks the request before processing
Tags
x402
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