Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/klh/speedy-claude/openapi-directory-firstnpx skills add klh/speedy-claude --skill openapi-directory-firstgit clone --depth 1 https://github.com/klh/speedy-claudeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/klh/speedy-claude/openapi-directory-first)<a href="https://agentmods.dev/skills/klh/speedy-claude/openapi-directory-first"><img src="https://agentmods.dev/badge/skills/klh/speedy-claude/openapi-directory-first.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00070 | $0.01039 |
| Opus 5 | $0.00035 | $0.00519 |
| Sonnet 5 | $0.00014 | $0.00208 |
| Haiku 4.5 | $0.00007 | $0.00104 |
Grade C, and why
openapi-directory-first scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -s "https://api.github.com/repos/APIs-guru/openapi-directory/contents/APIs/{provider.com}" | python3 -c " Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s "https://api.github.com/repos/APIs-guru/openapi-directory/contents/APIs/{provider.com}" | python3 -c " Copies of this mod
1 near-identical copy found in the catalogue:
- klh-openapi-directory-first — 95% identical, 9 lines differ
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenAPI Directory First
Overview
Always check the APIs-guru/openapi-directory for authoritative, machine-readable API specs before relying on training data or web searches. This directory contains 2500+ public API definitions in OpenAPI format, auto-updated weekly from original sources.
Core rule: Training data goes stale. OpenAPI specs are the source of truth.
When to Use
- Writing code that calls any public REST API
- Looking up endpoint parameters, auth, request/response schemas
- Debugging API integration issues (wrong params, unexpected responses)
- Generating API client code or types
- Answering questions about how a public API works
When NOT to Use
- Internal/private APIs (not in the directory)
- GraphQL APIs (directory is REST/OpenAPI only)
- When you already have the project's own OpenAPI spec locally
The Workflow
digraph api_lookup {
"Need API info" -> "Check openapi-directory";
"Check openapi-directory" -> "Found?";
"Found" -> "Use the spec";
"Not found" -> "Fallback: doc site or context7";
"Use the spec" -> "Still need examples?";
"Still need examples?" -> "Yes: search web" [label="yes"];
"Still need examples?" -> "Done" [label="no"];
}
How to Look Up
Step 1: Find the API
Search the directory for the provider domain:
# List available APIs for a provider
curl -s "https://api.github.com/repos/APIs-guru/openapi-directory/contents/APIs/{provider.com}" | python3 -c "
import json,sys
data=json.load(sys.stdin)
for item in data:
print(f'{item[\"name\"]}')"
Common provider domains: stripe.com, github.com, spotify.com, amazonaws.com, googleapis.com, microsoft.com, twilio.com, slack.com, shopify.com, paypal.com, sendgrid.com, notion.com, figma.com
Step 2: Pick the latest version
Providers often have multiple API versions. Use the most recent dated folder.
Step 3: Fetch the spec
https://raw.githubusercontent.com/APIs-guru/openapi-directory/main/APIs/{provider.com}/{version}/openapi.yaml
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday Changed · +2 lines fa74c62df8da
- 6d ago First seen · 112 lines · 70 tokens per session scan C f0114bc380a3
openapi-directory-first is a skill published in the GitHub repository klh/speedy-claude (11 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 1,039 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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