GraphQL Tools - GraphQL Schema Documentation
GraphQL Tools is a modular toolkit from The Guild for building, merging, stitching, transforming, and mocking GraphQL schemas. It is a library — not a hosted API — distributed as a set of npm packages under the `@graphql-tools/` scope. This SDL document captures the key types, interfaces, input types, and enumerations that make up the public API surface of the library.
Documentation
Endpoint
View on GitHub
API CompositionAPI GatewayAPI ObservabilityBreaking Change DetectionCI/CDCode GenerationDeveloper ToolsExecutionFederationGitHub ActionsGraphQLJavaScriptMicroservicesMiddlewareMockingOpen-SourcePluginsRESTSDKScalarsSchemaSchema CompositionSchema MergingSchema RegistrySchema StitchingSchema TransformationSchema ValidationServerSubscriptionThe GuildType MergingType SafetyTypeScriptgRPCGraphQL
GraphQL Tools - GraphQL Schema Documentation is a GraphQL API specification published by The Guild on the APIs.io network.
GraphQL Tools is a modular toolkit from The Guild for building, merging, stitching, transforming, and mocking GraphQL schemas. It is a library — not a hosted API — distributed as a set of npm packages under the @graphql-tools/ scope. This SDL document captures the key types, interfaces, input types, and enumerations that make up the public API surface of the library.
Tagged areas include API Composition, API Gateway, API Observability, Breaking Change Detection, and CI/CD.
Every GraphQL schema here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for graphql
4 MCP tools reach this
find_graphqlBrowse and filter every GraphQL schema in the catalog.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.
All 92 tools →
Call it yourself
curl for this page
This GraphQL schema
curl "https://apis.io/api/v1/graphql/graphql-tools-graphql"
All graphql
curl "https://apis.io/api/v1/graphql?limit=25"
Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
A second provider on the same verified email joins the account you already have.