dev-api

dev-api is a command for Claude Code from christopherlouet/claude-base. It costs 0 tokens per session (346 once invoked), scanned A, original, MIT.

A coding aid for creating or documenting REST, GraphQL, and tRPC web endpoints. It covers the endpoint contract, implementation, tests, validation, documentation, and versioning.

In plain words
What is it for?
Use it to design an endpoint, write its handler and integration tests, define validation and responses, produce OpenAPI or Swagger documentation, and plan API versions.
Why use it?
It gives API work a clear order and expected output, so requirements, error cases, tests, and documentation are less likely to be missed. TDD means writing tests before the implementation.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Good fit Use it to design an endpoint, write its handler and integration tests, define validation and responses, produce OpenAPI or Swagger documentation, and plan API versions.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/christopherlouet/claude-base/dev-api
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.

Clone the repo
git clone --depth 1 https://github.com/christopherlouet/claude-base

Made for: Claude Code.

Wrote 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.

agentmods badge for dev-api

README.md
[![agentmods](https://agentmods.dev/badge/commands/christopherlouet/claude-base/dev-api/github.svg)](https://agentmods.dev/commands/christopherlouet/claude-base/dev-api)
Your own site
<a href="https://agentmods.dev/commands/christopherlouet/claude-base/dev-api"><img src="https://agentmods.dev/badge/commands/christopherlouet/claude-base/dev-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dev-api

Your own site · 80×15
<a href="https://agentmods.dev/commands/christopherlouet/claude-base/dev-api"><img src="https://agentmods.dev/badge/commands/christopherlouet/claude-base/dev-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 346 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 5.1 $0.00000 $0.00346
Opus 5.5 $0.00000 $0.00138
Sonnet 5.5 $0.00000 $0.00069
Haiku 4.5 $0.00000 $0.00035

Measured 1mo ago against content hash 2c1b68cd7e15, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dev-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 1mo ago.

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.

.claude/commands/dev/dev-api.md · 54 lines

What it actually says

API Agent

Create or document REST, GraphQL, or tRPC endpoints, with a versioning strategy.

Endpoint or API to process

$ARGUMENTS

Goal

Develop well-structured, documented, and testable APIs following the TDD approach.

Use the dev-api skill for the detailed methodology (RESTful structure, validation, OpenAPI documentation, tests, tRPC type-safe routers, and API versioning). For GraphQL schema/resolver depth (DataLoader, N+1 prevention, Apollo pairing), the dedicated dev-graphql skill triggers automatically.

TDD prerequisites

Mandatory creation order:

  1. Define the API contract (OpenAPI spec/types)
  2. Write the integration tests (RED)
  3. Implement the handler (GREEN)
  4. Refactor if necessary (REFACTOR)
  5. Document (Swagger/OpenAPI)

Expected output

Endpoint specification

  • Method and path
  • Description
  • Parameters and body
  • Possible responses (success and errors)

Implementation code

  • Route with validation
  • Handler
  • Integration tests
Agent When to use it
/doc:doc-api-spec Generate OpenAPI/Swagger spec
/dev:dev-tdd Test the endpoints
/qa:qa-security API security audit
/qa:qa-review API code review

IMPORTANT: An API is a contract. Document before implementing.

IMPORTANT: Version the API (/v1/, /v2/) to avoid breaking changes.

YOU MUST validate all user inputs.

NEVER expose sensitive data in API responses.

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. 1mo ago First seen · 54 lines · 0 tokens per session scan A 2c1b68cd7e15

Subscribe to this mod's changes

dev-api is a command published in the GitHub repository christopherlouet/claude-base (5 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 346 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.