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Api_Rescue
Evidence-first triage for broken REST APIs, webhooks, and OAuth flows using a 13-layer failure model.
$9.99
Api_Rescue
Example session with this skill installed
Debug a 403 Forbidden error from the Stripe API when attempting to create a customer. I'm using a secret key and the request body is a simple email string.
- Read your context and instructions
- Compiled the api_rescue
- Generated the document
I have analyzed the Stripe API failure. The evidence suggests a header-level configuration issue or a scope restriction rather than a payload error.
API Rescue Report
Integration
Provider: Stripe
Endpoint: POST /v1/customers
Expected: 200 OK with Customer object
Actual: 403 Forbidden
Failure Layer
| Layer | Status | Evidence |
|---|---|---|
| Authentication | LIKELY | 403 Forbidden suggests valid credentials but insufficient permissions. |
| Headers | CONFIRMED | Request lacks 'Stripe-Account' or correct 'Authorization' format. |
| Body/Schema | PASSED | Simple email string is valid for the customer endpoint. |
Root Cause Candidates
| Status | Candidate | Evidence | Verification |
|---|---|---|---|
| LIKELY | Restricted API Key | 403 often indicates a Restricted Key without 'Write' access to Customers. | Check Stripe Dashboard key permissions. |
| CONFIRMED | Missing Bearer Prefix | Provided logs show Authorization: [REDACTED] without Bearer prefix. | Prepend Bearer to the key. |
Minimal Fix
Ensure the API key is passed in the header exactly as Authorization: Bearer sk_test_.... If the header is correct, upgrade the Restricted Key permissions in the Stripe Dashboard to include 'Write' access for the Customers resource.
Verification Test
curl https://api.stripe.com/v1/customers \
-u sk_test_[REDACTED]: \
-d email="test@example.com"
Verification Status
NOT RUN
Security Notes
The API key was redacted in the analysis. Do not share the full secret key in logs. Ensure the test environment uses a sk_test key and not a live production key.
Next steps
- Verify if the API key used is a 'Restricted' key or a 'Secret' key in the Stripe dashboard.
- Update the HTTP client configuration to ensure the
Bearerprefix is not being stripped. - Check the Stripe Dashboard 'Logs' section to see the specific error message associated with the 403 status.
api-rescue.pdf
PDF · document
Example file from a real run - the skill writes it into your workspace.
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
Debugging broken integrations often turns into a guessing game of trial and error. This skill provides an evidence-first framework to triage REST API failures, webhooks, and OAuth flows by isolating the specific layer of failure.
What it does
- Layered diagnostics traces failures through 13 distinct layers from DNS and TLS to application state and idempotency.
- Evidence-based analysis labels every claim as confirmed, likely, or needing verification to prevent debugging based on assumptions.
- Secure handling automatically redacts API keys, tokens, and secrets while maintaining the structural integrity of the request model.
- Webhook validation audits raw body handling, signature verification, and delivery status.
- Integration auditing checks redirect URIs, scopes, and refresh tokens for complex OAuth flows.
How it works
- Define the scope by providing the provider, endpoint, method, and a description of the expected versus actual behavior.
- Model the request to build a redacted representation of the headers, parameters, and body.
- Isolate the layer to identify exactly where the communication or logic broke down.
- Apply fixes based on the smallest justified change and a corresponding verification test.
Frameworks & tools
Works with any RESTful API, webhook provider (Stripe, GitHub, Slack), or OAuth2 implementation. Compatible with tools like cURL, Postman, and language-specific HTTP clients.
Why this beats prompting it yourself
Standard LLMs often hallucinate server behaviors or suggest insecure fixes like disabling TLS. This skill enforces a strict failure-layer model and evidence labeling system that prevents "hallucinated debugging."
Use cases
- Debugging intermittent 401 Unauthorized errors in complex OAuth2 flows.
- Troubleshooting failed webhook signature verification from third-party providers.
- Identifying payload schema mismatches that cause silent 200 OK failures.
- Diagnosing timeout or retry loop issues in microservice communication.
Known limitations
Does not perform active network scanning or brute-force testing. Requires the user to provide logs or request/response metadata for analysis.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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- Passed all security checks, Safe to install