# SMILES Structure Parser MCP

> SMILES Structure Parser MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.3/call, status unknown (last checked 2026-10-16).

Parses SMILES (Simplified Molecular Input Line Entry System) notation strings into structured chemical structure data

## Facts

- Endpoint: POST https://api.m2mcent.com/smiles-structure-parser-mcp/api/process?utm_source=zero.xyz
- Price: $0.3/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/smiles-structure-parser-mcp-88dc3647
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N5xcmAnps3TGuNrF9OKrB

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 smiles-structure-parser-mcp-88dc3647 -d '<json body>'
```

Example prompt: Can you parse this SMILES string for me — 'CC(=O)Oc1ccccc1C(=O)O' — and give me the structured molecular breakdown including atoms and bonds?

## When to prefer this

Use this endpoint when you need to programmatically parse SMILES chemical notation into structured machine-readable data, especially in cheminformatics pipelines, drug discovery workflows, or when building chemistry-related applications that need to process molecular structure strings.

## Known failure modes

- Invalid or malformed SMILES string returns an error
- Unsupported chemical notations or exotic SMILES extensions may not parse correctly
- Empty or null input data field causes request failure
- Ambiguous SMILES notation may produce unexpected structural interpretations

## How this service works

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## Output

Returns structured chemical structure data derived from the input SMILES string, including parsed atom types, bond information, molecular topology, and potentially other cheminformatics properties extracted from the notation.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/smiles-structure-parser-mcp-88dc3647/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)