Deterministic syntax validation — does this JSON/YAML/TOML/Python/regex parse?
Deterministic syntax validation — does this JSON/YAML/TOML/Python/regex parse? Valid/invalid + error location from the canonical parser. For long source use POST. Free sample, no payment required: GET /play/syntax
Answeringour last check, 2026-09-24
1 of 1checks answered this week
538 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://touchstone.locomot.io/syntax
| Category | Code and developer |
|---|---|
| Provider host | touchstone.locomot.io |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 538 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"content": "{\"a\": 1}",
"lang": "json"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"content": {
"description": "code/config to validate",
"type": "string"
},
"lang": {
"description": "json | yaml | toml | python | regex",
"type": "string"
},
"test": {
"description": "regex only: string to match",
"type": "string"
}
},
"required": [
"content",
"lang"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"error": {
"type": "null"
},
"lang": {
"type": "string"
},
"op": {
"type": "string"
},
"source": {
"type": "string"
},
"valid": {
"type": "boolean"
}
},
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}