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APIEval-20

APIEval-20

An open benchmark for AI agents that test APIs

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Launched May 8, 2026
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About APIEval-20

APIEval-20 offers a groundbreaking approach to testing AI-powered API agents by providing a standardized, objective benchmark. Designed for developers and AI researchers, it evaluates how effectively autonomous agents can identify bugs across various API functionalities, including authentication, error handling, pagination, schema validation, and multi-step workflows. What sets APIEval-20 apart is its black-box testing methodology: each agent operates solely with a JSON schema and a single sample payload, then generates a test suite that is run against live reference APIs containing intentionally planted bugs. The scoring system is entirely objective, measuring bug detection accuracy, API coverage, and efficiency without subjective judgments. Hosted openly on Hugging Face, this tool fosters transparency and community collaboration, making it ideal for advancing AI testing capabilities and benchmarking progress in API testing automation.

Screenshots

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Pros

  • ✓Objective, bug-for-bug scoring eliminates subjective bias
  • ✓Standardized benchmark enables fair comparison of AI agents
  • ✓Supports diverse API testing scenarios including auth, errors, and multi-step flows
  • ✓Openly accessible and hosted on Hugging Face for community use
  • ✓Encourages development of more robust AI testing agents

Cons

  • ✗Limited to API testing; not a general AI evaluation tool
  • ✗Requires familiarity with JSON schemas and payloads
  • ✗Potentially complex setup for beginners unfamiliar with API testing

Use Cases

1Benchmarking AI agents for API testing capabilities
2Training AI models to improve bug detection in APIs
3Automating API validation during continuous integration pipelines
4Developing more reliable API testing tools
5Educational use for learning API testing strategies
6Research in AI robustness and automation

Pricing

Likely free and open source, given its hosting on Hugging Face and focus on community benchmarking; specific pricing details are not provided.

Quick Info

Category💻 Developer Tools
Upvotes0
Comments2
Launched5/8/2026

Topics

APIDeveloper ToolsArtificial Intelligence

Alternatives

•Postman for API testing and automation
•Swagger/OpenAPI tools for schema validation
•Apigee for API management and testing
•Insomnia for API development and testing
•Paw for API testing and debugging

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