# agentshelf.syntexa.ch Lat/Lon Pair Validator

> agentshelf.syntexa.ch Lat/Lon Pair Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a well-formed latitude,longitude coordinate pair within valid geographic ranges.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-latlon?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-lat-lon-pair-validator-531ae512
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lg59YtT6dDljPz9rKT7y9

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 agentshelf-syntexa-ch-lat-lon-pair-validator-531ae512 -d '<json body>'
```

Example prompt: Can you check whether the string '48.8566,2.3522' is a valid latitude,longitude coordinate pair within proper geographic ranges?

## When to prefer this

Use this endpoint when you need a quick, cheap, authoritative check that a string is a properly formatted and geographically valid lat/lon coordinate pair. Prefer the unpaid POST /v1/sandbox/check-latlon endpoint for testing or non-production use to avoid the $0.007 USDC cost per call. Choose this over manual regex checks when correctness (range validation, not just format) is required.

## Known failure modes

- Empty string input returns validation error
- String exceeding 20,000 characters rejected
- Malformed JSON body returns 400
- Non-string value type for 'value' field causes schema error
- Payment of exactly $0.007 USDC required — underpayment causes 402 rejection

## How this service works

Call when an agent needs whether a string is a latitude,longitude pair in range. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/check-latlon first.

## Output

Returns a boolean or structured result indicating whether the provided string represents a valid latitude,longitude pair with both values in acceptable geographic ranges (latitude -90 to 90, longitude -180 to 180).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."
  },
  "value": {
   "type": "string",
   "examples": [
    "37.3,-121.8"
   ],
   "maxLength": 20000,
   "minLength": 1,
   "description": "Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."
  },
  "schema": {
   "description": "JSON Schema document for schema-check SKUs. Omit it on string checks."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-syntexa-ch-lat-lon-pair-validator-531ae512/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)