api_client

api_client is a skill for Claude Code, Codex from jxoesneon/Ciel. It costs 19 tokens per session (343 once invoked), scanned A, original, Apache-2.0.

An HTTP client for calling web APIs, including REST APIs and GraphQL APIs, which let software exchange data over the web. It supports named credentials, common authentication methods, error handling, and retries.

In plain words
What is it for?
Use it to send REST requests, run GraphQL queries, authenticate with an external service, or retry an API call with backoff.
Why use it?
It provides a consistent way to make API requests while keeping credentials out of code and retrying suitable temporary failures.

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/jxoesneon/ciel/api_client
Any agent
npx skills add jxoesneon/Ciel --skill api_client
Clone the repo
git clone --depth 1 https://github.com/jxoesneon/Ciel

Made for: Claude Code, Codex.

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 api_client

README.md
[![agentmods](https://agentmods.dev/badge/skills/jxoesneon/ciel/api_client.svg)](https://agentmods.dev/skills/jxoesneon/ciel/api_client)
Your own site
<a href="https://agentmods.dev/skills/jxoesneon/ciel/api_client"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/api_client.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 343 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 $0.00019 $0.00343
Opus 5 $0.00010 $0.00171
Sonnet 5 $0.00004 $0.00069
Haiku 4.5 $0.00002 $0.00034

Measured 3d ago against content hash a4edda841061, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api_client 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 3d 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.

ciel.skill/seed_skills/api_client/SKILL.md · 42 lines

What it actually says

api_client

HTTP REST / GraphQL client with auth and retry.

Operations

  • api.request(method, url, headers?, body?, auth?)
  • api.graphql(endpoint, query, vars?, auth?)
  • api.with_retry(call, strategy) — exponential backoff, idempotency keys.

Auth

Auth credentials pulled via secrets_manager/SKILL.md by name — never inline. Bearer, Basic, OAuth2, API-key header, HMAC.

I/O Contract

io_contract:
  input: { method, url, "headers?", "body?", "auth_ref?" }
  output: { status, body, headers }
  idempotent: depends_on_method
  side_effects: [network]

Safety

  • State-mutating methods (POST/PUT/PATCH/DELETE) to external endpoints are at least mid-risk.
  • Sending to internal / production endpoints is high/critical.
  • Request/response bodies stored hashed, not raw, for audit.
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. 3d ago First seen · 42 lines · 19 tokens per session scan A a4edda841061

Subscribe to this mod's changes

api_client is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed 3d ago), licensed Apache-2.0. It adds 19 tokens to every session and 343 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 2026-08-31.

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