# Tilde Semver Range Validator

> Tilde Semver Range Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Checks whether a given string is a valid tilde (~) semver range expression

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-semver-tilde?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tilde-semver-range-validator-2f775dc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AohPhMl4lFTmF9ugcKeyX

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 tilde-semver-range-validator-2f775dc2 -d '<json body>'
```

Example prompt: Can you check if the string '~1.4.2' is a valid tilde semver range?

## When to prefer this

Use this endpoint when you specifically need to validate whether a string uses tilde (~) semver range syntax and no free sandbox alternative (POST /v1/sandbox/check-semver-tilde) is available or has already been exhausted. Prefer the unpaid sandbox endpoint first to avoid unnecessary charges.

## Known failure modes

- Empty or missing value field returns a validation error
- String exceeding 20000 characters is rejected
- Malformed request body returns HTTP 400
- Payment of exactly $0.003 USDC required; underpayment causes HTTP 402
- Network timeout from upstream service

## How this service works

Call when an agent needs whether a string is a tilde semver range. Send JSON {"value":"~1.2.3"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/check-semver-tilde first.

## Output

A boolean or classification indicating whether the submitted string is a valid tilde semver range (e.g. ~1.2.3, ~0.5), helping agents determine if the input conforms to tilde-range semver syntax.

## 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": [
    "~1.2.3"
   ],
   "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/tilde-semver-range-validator-2f775dc2/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)