Regex matching, email/URL format validation, and JSON Schema validation.
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Checks value is a single, bare RFC 5322 email address — syntax only, not a deliverability check. user@localhost is valid (no TLD required). "Name <email>" display syntax is rejected.
identifier or value to check
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Checks value is a single, bare RFC 5322 email address — syntax only, not a deliverability check. user@localhost is valid (no TLD required). "Name <email>" display syntax is rejected.
| Argument | Type |
|---|
| Description |
|---|
| value* | string | identifier or value to check |
{
"type": "object",
"required": [
"value"
],
"properties": {
"value": {
"type": "string",
"description": "identifier or value to check"
}
},
"additionalProperties": false
}Validates document against schema (JSON Schema draft-07 or 2020-12). Reports one specific violation per call, not an aggregated list.
| Argument | Type | Description |
|---|---|---|
| schema* | any | a JSON Schema (draft-07 or 2020-12) |
| document* | any | the JSON value to validate against schema |
{
"type": "object",
"required": [
"schema",
"document"
],
"properties": {
"schema": {
"description": "a JSON Schema (draft-07 or 2020-12)"
},
"document": {
"description": "the JSON value to validate against schema"
}
},
"additionalProperties": false
}Tests input against pattern (Go's regexp package: RE2 syntax, not PCRE — no backreferences or lookaround; use inline flags like (?i) for case-insensitive matching). Returns the full match and captured groups.
| Argument | Type | Description |
|---|---|---|
| input* | string | |
| pattern* | string | RE2 syntax |
{
"type": "object",
"required": [
"pattern",
"input"
],
"properties": {
"input": {
"type": "string"
},
"pattern": {
"type": "string",
"description": "RE2 syntax"
}
},
"additionalProperties": false
}Checks value is a well-formed absolute URL (has both a scheme and a host) — syntax only, not a reachability check.
| Argument | Type | Description |
|---|---|---|
| value* | string | identifier or value to check |
{
"type": "object",
"required": [
"value"
],
"properties": {
"value": {
"type": "string",
"description": "identifier or value to check"
}
},
"additionalProperties": false
}