api-docs

A reference tool for the Anthropic Messages API, which lets applications send requests to Claude. It provides short example snippets in several programming languages for common API operations.

In plain words
What is it for?
Use it for message creation, streaming responses, tool calls, image input, batch processing, and text embeddings in Python, TypeScript, Java, Go, Ruby, PHP, or C#.
Why use it?
It reduces the need to look up syntax when building or checking Anthropic API integrations.

Skill for Claude CodeCodex

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 skills/apiliumcode/mayros/api-docs
Any agent
npx skills add ApiliumCode/mayros --skill api-docs
Clone the repo
git clone --depth 1 https://github.com/ApiliumCode/mayros

Made for: Claude Code, Codex.

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 283 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00015 $0.00283
Opus 5 $0.00008 $0.00142
Sonnet 5 $0.00003 $0.00057
Haiku 4.5 $0.00002 $0.00028

Measured 2d ago against content hash 0ec0861932c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-docs 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 2d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (skill.test.ts, skill.ts, types.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/official/api-docs/SKILL.md · 43 lines

What it actually says

api-docs

Enriches API-related queries with compact, multi-language SDK code snippets for the Anthropic Messages API.

When to Use

Use when working with the Anthropic API, generating SDK examples, or when you need quick reference snippets for common API operations across multiple programming languages.

Supported Operations

  • messages -- Basic message creation
  • streaming -- Server-sent events streaming
  • tool_use -- Tool/function calling
  • vision -- Image input processing
  • batch -- Batch message processing
  • embeddings -- Text embeddings

Supported Languages

Python, TypeScript, Java, Go, Ruby, PHP, C#

Instructions

  1. Recall any previous API documentation context with skill_memory_context
  2. Analyze query results for operation keywords (e.g., "stream", "tool", "vision")
  3. Detect the target programming language from context
  4. Return matching code snippets; defaults to Python and TypeScript if no language is detected
Files

What ships with it

9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 43 lines · 15 tokens per session scan A 0ec0861932c6

Subscribe to this mod's changes

api-docs is a skill published in the GitHub repository ApiliumCode/mayros (12 stars, last pushed 1mo ago), licensed MIT. It adds 15 tokens to every session and 283 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.