# PubChem Compound Chemical Properties Lookup

> PubChem Compound Chemical Properties Lookup is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns molecular formula, molecular weight, and IUPAC name for a chemical compound by name via NIH PubChem

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-pubchem-compound
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pubchem-compound-chemical-properties-lookup-8cdb979c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qTKHxeVYwEeyWGWdzjcY9

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability pubchem-compound-chemical-properties-lookup-8cdb979c -d '<json body>'
```

Example prompt: Look up the chemical properties of caffeine — I need its molecular formula, molecular weight, and IUPAC name from PubChem.

## When to prefer this

Use this endpoint when you need quick, no-API-key access to basic chemical properties (molecular formula, molecular weight, IUPAC name) from the authoritative NIH PubChem database, especially in agentic pipelines where obtaining a PubChem API key is impractical. Prefer this over direct PubChem API calls when operating in a pay-per-use x402 payment context.

## Known failure modes

- Compound name not recognized by PubChem — returns empty or error response
- Ambiguous compound name matching multiple PubChem entries — may return first match or fail
- NIH PubChem upstream service unavailable — proxy returns 5xx error
- Malformed request body — returns 400 bad request
- Payment not received — returns 402 payment required

## How this service works

Chemical properties for a compound by name from the NIH PubChem service, no key. Returns molecular formula, molecular weight, and IUPAC name. For AI agents in chemistry, drug discovery, and materials research.

## Output

Returns a JSON object containing the molecular formula (e.g. C8H10N4O2), molecular weight (e.g. 194.19 g/mol), and IUPAC name (e.g. 1,3,7-trimethylpurine-2,6-dione) for the queried compound as sourced from NIH PubChem.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pubchem-compound-chemical-properties-lookup-8cdb979c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)