# Graphql Schema Validator — REST API endpoint `graphql-schema-validator`

Validate a GraphQL SDL schema and return errors, naming-convention warnings, and counts of types, queries, mutations, and subscriptions. Errors cover unbalanced braces, fields without a type, double colons, and malformed return types; warnings cover type names that are not PascalCase, field names that are not camelCase, and a missing Query type.

- Category: seo
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/graphql-schema-validator/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/api/graphql-schema-validator/
- Same tool on the other surface: https://findutils.com/mcp/graphql-schema-validator/

## Call the endpoint (verified example)

```bash
curl -X POST https://api.findutils.com/api/tools/graphql-schema-validator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "schema": "type Query {\n  users: [User!]!\n}\n\ntype User {\n  id: ID!\n  name: String\n}"
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/graphql-schema-validator
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `schema` | string | yes | GraphQL schema in SDL (type definitions). |

Example arguments (verified):

```json
{
  "schema": "type Query {\n  users: [User!]!\n}\n\ntype User {\n  id: ID!\n  name: String\n}"
}
```

OpenAPI 3.1 spec: https://findutils.com/api/openapi.json · Interactive docs: https://findutils.com/api/docs/

## Also an MCP tool

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Then ask the client to call `findutils:graphql_schema_validator`. Full MCP reference: https://findutils.com/mcp/graphql-schema-validator/

---
Full catalog: GET https://api.findutils.com/api/tools · https://findutils.com/api/ · https://findutils.com/llms.txt