LLMs suck at writing integration code… for now
Hi HN! Stefan here from superglue and today I’d like to share a new benchmark we’ve just open sourced: an Agent-API Benchmark, in which we test how well LLMs handle APIs. We gave LLMs API documentation and asked them to write code that makes actual API calls. Things like "create a Stripe customer" or "send a Slack message". We're not testing if they can use SDKs; we're testing if they can write raw HTTP requests (with proper auth, headers, body formatting) that actually work when executed against real API endpoints and can extract relevant information from that response. tl:dr: LLMs suck at…
LLMs suck at writing integration code… for now launched on July 24, 2025 with 20 votes, #764 of 9,223 launches that month and more than 90% of that year's launches. The site was not reachable when checked in September 2026.
In plain words
Superglue has open-sourced an Agent-API Benchmark that tests how well large language models can write integration code to call real APIs. The benchmark evaluates whether LLMs can generate correct HTTP requests with proper authentication, headers, and formatting to accomplish tasks like creating Stripe customers or sending Slack messages. Testing across 630 integration tests on 21 common APIs using six different LLMs revealed that the best-performing model achieved only a 68% success rate, indicating significant room for improvement in this area.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN! Stefan here from superglue and today I’d like to share a new benchmark we’ve just open sourced: an Agent-API Benchmark, in which we test how well LLMs handle APIs. We gave LLMs API documentation and asked them to write code that makes actual API calls. Things like "create a Stripe customer" or "send a Slack…
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