# IranTools Persian Text Similarity

> IranTools Persian Text Similarity is a paid API for AI agents from irantools.johnaio281.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-22).

Computes semantic or string similarity between two Persian/Farsi text strings

## Facts

- Endpoint: POST https://irantools.johnaio281.workers.dev/api/iran/persian_similarity?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/irantools-persian-text-similarity-45f56c4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EvDCO2er38mhl1BsGV8RC

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 irantools-persian-text-similarity-45f56c4e -d '<json body>'
```

Example prompt: How similar are these two Persian sentences — 'سلام، حال شما چطور است؟' and 'حال شما خوب است؟' — give me a similarity score.

## When to prefer this

Choose this endpoint when you need to compare two Persian/Farsi text strings for similarity, especially within an Iranian-language context where Persian-aware normalization and script handling are important. Prefer this over generic string distance libraries when the text may contain Persian-specific characters, diacritics, or Unicode homoglyphs that need proper normalization before comparison.

## Known failure modes

- Missing required field 'a' or 'b' returns a validation error
- Empty strings may return a default or zero similarity score
- Non-Persian (non-Farsi) input may still be processed but results may be less meaningful
- Payment failure (insufficient USDC balance) returns HTTP 402
- Extremely long strings may cause latency or be rejected

## How this service works

Persian and Iranian utilities for AI agents, plus general text/Unicode tooling. Jalali (Solar Hijri) calendar conversion, Iranian national ID / SHEBA / bank card / postal code / economic code validation, province and city lookup, official public holidays, Persian text normalization, keyword extraction, sentence splitting, similarity, HTML stripping, RTL fixing, Unicode homoglyph folding, script detection, NFC/NFD normalization, grapheme counting, date description, business-day counting, slugify, FNV-1a hashing, Shannon entropy, format and encoding detection, byte sizes. Pay per call in USDC on Base via x402 - no signup, no API key, no KYC. The same tools are also exposed as MCP tools at /mcp.

## Output

Returns a JSON object containing a similarity score (likely a float between 0 and 1) indicating how similar the two input Persian strings are, where higher values indicate greater similarity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "a",
  "b"
 ],
 "properties": {
  "a": {
   "type": "string"
  },
  "b": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/irantools-persian-text-similarity-45f56c4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from irantools.johnaio281.workers.dev](https://www.zero.xyz/host/irantools.johnaio281.workers.dev/llms.txt)