# PubChem compound synonyms

All names of a chemical from PubChem by name, CID or InChIKey: common and trade names, IUPAC-style names, CAS registry numbers, UNII and vendor codes, most. Needs identifier.

All names of a chemical from PubChem by name, CID or InChIKey: common and trade names, IUPAC-style names, CAS registry numbers, UNII and vendor codes, most common first. Use it to find the CAS number of an ingredient or every brand a substance is sold under. Returns 404 for an unknown compound. Popular compounds have thousands of synonyms, so long lists are cut.

- Tool ID: `pubchem/compound-synonyms`
- Provider: [PubChem](/providers/pubchem.md)
- Capability: [Knowledge & research](/tools/knowledge.md)
- Price: no charge per call
- Authentication: an authorised Agentik workspace is required for execution, including zero-price tools.

## Pricing contract

No charge per call. A workspace is still needed so your agent can call it.


```json
{
  "model": "per_call",
  "amountUsd": 0
}
```

## Complete input schema


```json
{
  "type": "object",
  "properties": {
    "namespace": {
      "type": "string",
      "enum": [
        "name",
        "cid",
        "inchikey"
      ],
      "default": "name",
      "description": "Identifier type, e.g. 'name'"
    },
    "identifier": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200,
      "description": "Compound name, CID or InChIKey, e.g. 'niacinamide' or '936'"
    }
  },
  "required": [
    "identifier"
  ],
  "additionalProperties": false
}
```

## Published example

This is the provider tool’s published example. Replace example values with the user’s requested inputs, respecting the schema; do not execute an example merely to test a connection.


```json
{
  "tool_id": "pubchem/compound-synonyms",
  "input": {
    "identifier": "niacinamide"
  }
}
```

## Execute and retrieve

Inspect again before execution, explain the price and obtain the required authority. Use MCP run_tool or POST /v1/run with this tool ID, valid input and an idempotency key. Save the returned run ID and follow the actual state. If Agentik answers that the tool is temporarily unavailable, do not retry it blindly; use discovery to propose an alternative.

A partial or uncertain result can still have consumed provider resources. Consult [billing](/docs/billing.md), [idempotency](/docs/idempotency.md) and [asynchronous results](/docs/async.md).

Licence: NCBI PubChem data policy (no NCBI restrictions on use).

Attribution: Data from PubChem, National Center for Biotechnology Information (NCBI).

[Provider documentation](https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest)

[REST inspection](https://api.agentik.cc/v1/tools/pubchem/compound-synonyms) · [OpenAPI](/openapi.json) · [Connection guide](/connect.md)

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[HTML page](/providers/pubchem/compound-synonyms) · [Agent index](/llms.txt)