api

A command that starts an agent for building backend APIs, which let software exchange data and actions.

In plain words
What is it for?
Use it to design and build authenticated REST or GraphQL API backends.
Why use it?
It helps plan and implement REST or GraphQL APIs with authentication and common development practices.

Command

Install

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.

agentmods
npx agentmods add commands/webdevtodayjason/sub-agents/api
Clone the repo
git clone --depth 1 https://github.com/webdevtodayjason/sub-agents
Per session 10 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 43 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 88% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00010 $0.00043
Opus 5 $0.00005 $0.00022
Sonnet 5 $0.00002 $0.00009
Haiku 4.5 $0.00001 $0.00004

Measured yesterday against content hash 7c362fb3795a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api scanned grade A with 0 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

88% identical to api — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

commands/api.md · 8 lines

What it actually says

Design and implement robust REST and GraphQL APIs with authentication and best practices.

Changes

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.

  1. yesterday First seen · 8 lines · 10 tokens per session scan A 7c362fb3795a

Subscribe to this mod's changes

api is a command published in the GitHub repository webdevtodayjason/sub-agents (201 stars, last pushed 2mo ago), licensed MIT. It adds 10 tokens to every session and 43 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to api, differing in 2 lines, and is treated as a copy.