# Maha Chemistry Fingerprint Similarity

> Maha Chemistry Fingerprint Similarity is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.028001/call, status unknown (last checked 2026-10-26).

Compares two molecules using a declared fingerprint and similarity metric, returning a computed similarity score for cheminformatics analysis.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/micro/chemistry-fingerprint-similarity?utm_source=zero.xyz
- Price: $0.028001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/maha-chemistry-fingerprint-similarity-09222cdf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m3g2SB-Si_i1kSVuPP2ZU

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 maha-chemistry-fingerprint-similarity-09222cdf -d '<json body>'
```

Example prompt: Can you compare these two molecules for me — left: 'CC(=O)Oc1ccccc1C(=O)O' and right: 'CC(=O)Nc1ccc(O)cc1' — using the public data class and give me their fingerprint similarity score?

## When to prefer this

Choose this endpoint when you need a fast, auditable, per-call paid computation of molecular fingerprint similarity between exactly two molecules, particularly when working with public or synthetic chemical datasets. Prefer it over full cheminformatics suites when you want a lightweight, reproducible, receipt-backed pairwise comparison without standing up local tooling. It is not a substitute for pharmacological equivalence or safety assessment.

## Known failure modes

- Invalid or unparseable molecule string — returns an error if left or right strings cannot be interpreted as valid molecular representations
- Missing required fields (left, right, dataClass) — returns a validation error
- dataClass enum mismatch — only 'public' or 'synthetic' are accepted
- Molecule string exceeds 512 character limit — rejected with a length error
- Payment failure — x402 payment not accepted or insufficient funds

## How this service works

Compare supplied molecules using a declared fingerprint and similarity metric. For dataset analysis; chemical similarity does not establish equivalent function or safety.

## Output

Returns a structured receipt containing a similarity result object, a version identifier (maha-microproducts/0.1), an offer ID (chemistry-fingerprint-similarity), the amount charged in base units (28001), an input digest, a receipt digest, and a boundaries array — the core similarity score is inside the result object.

## 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": {
     "type": "object",
     "required": [
      "dataClass",
      "left",
      "right"
     ],
     "properties": {
      "left": {
       "type": "string",
       "maxLength": 512,
       "minLength": 1
      },
      "right": {
       "type": "string",
       "maxLength": 512,
       "minLength": 1
      },
      "dataClass": {
       "enum": [
        "public",
        "synthetic"
       ],
       "type": "string"
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "version",
      "offerId",
      "amountBaseUnits",
      "inputDigest",
      "result",
      "boundaries",
      "receiptDigest"
     ],
     "properties": {
      "result": {
       "type": "object"
      },
      "offerId": {
       "enum": [
        "chemistry-fingerprint-similarity"
       ],
       "type": "string"
      },
      "version": {
       "enum": [
        "maha-microproducts/0.1"
       ],
       "type": "string"
      },
      "boundaries": {
       "type": "array",
       "maxItems": 128,
       "minItems": 0
      },
      "inputDigest": {
       "type": "string",
       "maxLength": 71
      },
      "receiptDigest": {
       "type": "string",
       "maxLength": 71
      },
      "amountBaseUnits": {
       "enum": [
        "28001"
       ],
       "type": "string"
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/maha-chemistry-fingerprint-similarity-09222cdf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.mahastrategies.com](https://www.zero.xyz/host/www.mahastrategies.com/llms.txt)