# AgentsTools Match Key – Deterministic Similarity Key Generator

> AgentsTools Match Key – Deterministic Similarity Key Generator is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Computes a deterministic similarity key, normalized form, and tokens for a name or address string to enable cheap client-side deduplication and record blocking.

## Facts

- Endpoint: GET https://api.agentstools.dev/match/key
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentstools-match-key-deterministic-similarity-key-generator-08ef8d5f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__MFpv_WlIDtORu6iGB0eU

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 agentstools-match-key-deterministic-similarity-key-generator-08ef8d5f
```

Example prompt: Generate a deterministic similarity key for the company name 'Acme Corp.' — use the company entity type so I can use it to find duplicate records in my database.

## When to prefer this

Use this endpoint when you need a cheap, fast, deterministic first-pass blocking step before doing expensive fuzzy matching or authoritative identity resolution. Ideal for client-side deduplication pipelines where you want to group candidate duplicate records by a shared key without making full comparisons. Prefer this over full entity resolution APIs when cost and latency matter and you only need blocking-level signals.

## Known failure modes

- Missing required 'value' query parameter returns a 400 or validation error
- Invalid entity type enum value causes a validation error
- Empty string input may return a trivial or error key
- Payment not included or insufficient causes 402 Payment Required
- Network timeout or upstream error returns 5xx

## How this service works

Compute a deterministic similarity key for a name or address: the cheap first step of client-side blocking and deduplication. Records that share a key are duplicate candidates to confirm. Returns the key, the normalized form and the tokens. Indicators, not authoritative identity resolution.

## Output

Returns a deterministic similarity key string, the normalized form of the input, and an array of tokens. These can be used to group records that are duplicate candidates — they are indicators, not authoritative identity resolution.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "type": {
       "enum": [
        "person",
        "company",
        "address",
        "product",
        "org"
       ],
       "type": "string",
       "description": "Entity type selecting the normalization pipeline (default company)"
      },
      "value": {
       "type": "string",
       "description": "The string to key"
      }
     }
    }
   },
   "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/agentstools-match-key-deterministic-similarity-key-generator-08ef8d5f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentstools.dev](https://www.zero.xyz/host/api.agentstools.dev/llms.txt)