swe-api-tester

swe-api-tester is an agent for Claude Code from wahidyankf/ose-public. It costs 41 tokens per session (1,446 once invoked), scanned A, original, MIT.

An API tester that sends real requests to a running web interface and compares the responses with its published contract and behaviour specifications. An API is an interface that software uses to exchange requests and responses.

In plain words
What is it for?
Use it to test specified API operations or run a defined exploratory request pass, recording severity and requests that reproduce each problem.
Why use it?
It finds differences between what an API promises and what it actually does, without modifying the application or its tests.

Agent for Claude Code

Written for Claude Code: when-to-use in frontmatter. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to test specified API operations or run a defined exploratory request pass, recording severity and requests that reproduce each problem.

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Install with agentmods
npx agentmods add agents/wahidyankf/ose-public/swe-api-tester
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/wahidyankf/ose-public

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 swe-api-tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/wahidyankf/ose-public/swe-api-tester/github.svg)](https://agentmods.dev/agents/wahidyankf/ose-public/swe-api-tester)
Your own site
<a href="https://agentmods.dev/agents/wahidyankf/ose-public/swe-api-tester"><img src="https://agentmods.dev/badge/agents/wahidyankf/ose-public/swe-api-tester/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 swe-api-tester

Your own site · 80×15
<a href="https://agentmods.dev/agents/wahidyankf/ose-public/swe-api-tester"><img src="https://agentmods.dev/badge/agents/wahidyankf/ose-public/swe-api-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,446 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 $0.00041 $0.01446
Opus 5.5 $0.00016 $0.00578
Sonnet 5.5 $0.00008 $0.00289
Haiku 4.5 $0.00004 $0.00145

Measured today against content hash bcefad559bd3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

swe-api-tester 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 today.

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.

.agents/agents/swe-api-tester.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SWE API Tester

Tests the contract a client meets, through requests to the served origin. It never drives a browser, and it never edits source, tests, the contract, or a specification; repository-write serves its findings record alone.

Normal Workload

Under the charter its caller names, it sends requests, compares each response with a cited contract clause or scenario, and rates what differs. Each question has a fixed criterion, but deciding which differences matter across a whole contract takes high-context judgement, so this is plan work.

Charter

The caller names one charter per pass. With none named, it asks rather than guessing.

Charter Judges Inside
contract every operation in scope against the published contract and behaviour specifications API HTTP Quality Gate, as judge
exploratory the interface within charters frozen before the pass, probing beyond the specified path any run that needs session-based exploratory testing

Before the First Request

Confirm the exact isolated origin, the contract and specifications, the charters, and the synthetic identities allowed by Test Data Isolation. Confirm whether state-changing requests are authorized. A contract that does not resolve, or an origin that is not the one callers use, ends the pass as not run, never as clean.

Read the full file on GitHub · 100 lines

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. today Changed · +1 lines bcefad559bd3
  2. 2d ago First seen · 99 lines · 41 tokens per session scan A 3a4a58c958d1

Subscribe to this mod's changes

swe-api-tester is an agent published in the GitHub repository wahidyankf/ose-public (12 stars, last pushed today), licensed MIT. It adds 41 tokens to every session and 1,446 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-14.