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GraphQL Inspector

Free#17 of 22 in Contract Testing ToolsGraphQL Tools

GraphQL Inspector: A focused, open-source toolkit for GraphQL schema evolution and client validation. Ranked #17 of 22 in Contract Testing Tools by our editors (7.5/10); pricing: Free plan; best for graphQL teams monitoring schema changes.

7.5/10Editor score
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GraphQL Inspector7.5 Visit site

At a glance

  • Editor score
    7.5 / 10
  • Pricing
    Free plan
  • Best for
    GraphQL teams monitoring schema changes
  • Free plan
    Yes
  • Paid from
    Free
  • Contract registry
    No
  • Facts checked
    20 Sep 2026

  • Where it wins

    • Classifies GraphQL changes as breaking, dangerous, or safe
    • Validates operations and fragments while measuring schema coverage
    • Runs through CLI, GitHub Actions, API, Docker, and webhooks

  • Where it doesn't

    • Focused on GraphQL schemas rather than broader contract formats
    • Does not provide a contract registry
    • The former GraphQL Inspector GitHub Application is deprecated

Our verdict on GraphQL Inspector

GraphQL Inspector is an open-source toolkit for teams managing GraphQL schema evolution and client operations. It compares schemas, identifies breaking, dangerous, and safe changes, validates operations and fragments, measures schema coverage, detects similar and duplicate types, and sends schema-change notifications. Developers can run it through a command-line tool, GitHub Action, programmatic API, or Docker image, making it suited to repository checks and CI/CD workflows.

Its strongest fit is a GraphQL workflow built around GitHub and automated change review. GitHub Action integration can place schema checks in repository workflows, while integrations with GitHub, Slack, Discord, and webhooks support notification and collaboration paths. The published capabilities also include consumer and provider verification for GraphQL schemas in GraphQL SDL format. Teams that prefer self-managed infrastructure can use the self-hosted platform option and Docker distribution, while API access supports programmatic integration.

GraphQL Inspector is available as open source with a free plan, so its value is concentrated in focused schema governance rather than tiered commercial packaging. It is a strong choice for teams that need to track schema changes, validate client usage, and identify coverage or compatibility issues without adopting a broader contract registry. The narrow scope is also its main boundary: it is designed around GraphQL schemas, and the category specifications do not include a contract registry. Teams working across other contract formats or requiring registry capabilities should choose a broader alternative. The former GraphQL Inspector GitHub Application is deprecated, while the CLI, GitHub Action, programmatic API, and Docker distribution remain available.

Your product? Our editors can test GraphQL Inspector in depth and publish a review, labelled as paid · from $149/mo →

GraphQL Inspector pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on the-guild.dev

GraphQL Inspector fact sheet

Free planYes
Paid fromFree
Contract formatsGraphQL schemas in GraphQL SDL format
Consumer verificationYes
Provider verificationYes
Contract registryNo
AsyncAPI supportNot verified
GraphQL supportYes
Self-hosted deploymentYes
DeploymentSelf-hosted
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations4 integrations: GitHub, Slack, Discord, Webhooks
PricingFree plan
Websitethe-guild.dev
Facts checked20 Sep 2026

GraphQL Inspector integrations

GraphQL Inspector lists 4 integrations on its own site.

  • GitHub
  • Slack
  • Discord
  • Webhooks

Alternatives to GraphQL Inspector

See all GraphQL Inspector alternatives →

Also Ranked In

GraphQL Inspector is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — GraphQL Inspector 7.5/10

GraphQL Inspector is listed in our Contract Testing Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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