API Reliability Monitoring: from implementation to decision
A complete api reliability monitoring measurement loop connects one owned workflow, a bounded event contract, a controlled fixture, and a question someone can act on.
- 1
Set the boundary
Log completed and failed API requests from server handlers.
- 2
Capture the outcome
Begin with api_request_started, api_request_completed, api_request_failed and document the grain of each event.
- 3
Prove the rows
Create dashboards and alerts for error rate, p95 latency, and top failing routes.
- 4
Make the decision
Which routes are slowest by p95 latency?
Use case versus template
This page explains what to measure and why
Use the use-case guide to choose outcomes, event boundaries, and analysis questions. Open the matching template when you are ready for a shorter copy-paste implementation brief.
Agent prompt
Paste this into your coding agent
Replace YOUR_API_KEY after signup, then ask the agent to run the product flow and verify the first events.
API Reliability Monitoring setup prompt
Add Telemetry instrumentation for API reliability.
Use /skill.md and this Telemetry API key: YOUR_API_KEY
Please log each important API endpoint with route_template, method, status_code, status, latency_ms, user_id or team_id when available, request_size_bytes, response_size_bytes, and error_type.
Create:
1. A table for API request events.
2. Charts for request volume, error rate, p50 and p95 latency, and top failing endpoints.
3. Alerts for elevated 5xx rate, slow p95 latency, and sudden traffic drops.
Do not log request bodies, auth headers, cookies, secrets, or raw user content.Setup steps
- 1Log completed and failed API requests from server handlers.
- 2Use route templates instead of raw URLs to keep cardinality clean.
- 3Capture status, latency, method, feature, team, and error type.
- 4Create dashboards and alerts for error rate, p95 latency, and top failing routes.
Events to capture
Questions unlocked
- Which routes are slowest by p95 latency?
- Which customer accounts are affected by errors?
- Where did traffic suddenly drop or spike?
Event schema starting points
Event contracts for this workflow
Review the row grain, emit boundary, required types, privacy classes, example payload, and validation checklist before adapting a query or snippet to production.
Related product capability
Continue this workflow in Alerts
Promote the reviewed reliability query into an owned threshold and response workflow.
Related SQL recipes
Answer the next question with SQL
Run the query against the structured fields from this workflow, inspect the example result, and turn a useful answer into a dashboard or alert.
Calculate API Request Throughput by Route
Which API routes are processing the most requests per minute?
Open recipeMeasure API 429 Rate-Limit Recovery
Do requests that receive HTTP 429 recover successfully after retrying?
Open recipeCalculate Incident Detection and Recovery Time
How long does each service take to detect and recover from incidents?
Open recipeCalculate API Error Rate by Route
Which API routes have the highest meaningful 5xx error rate?
Open recipeCalculate p50, p95, and p99 API Latency
Which endpoints have the worst tail latency?
Open recipeCalculate API Timeout Rate by Route
Which API routes time out often enough to affect users?
Open recipeCompare Dependency p95 Latency
Which downstream dependencies have the worst tail latency and failure rate?
Open recipeMeasure API Availability Against an SLO
Did each service meet its daily availability objective?
Open recipeCalculate API Error-Budget Burn Rate
How quickly is the API consuming its 99.9% availability budget?
Open recipeCompare API Reliability by Release
Which releases coincide with worse API errors or tail latency?
Open recipeRank Error Fingerprints by Customer Impact
Which error groups affect the most customer accounts?
Open recipeCompare Feature Rollout Error Rate
Is the feature-flag rollout less reliable than its control cohort?
Open recipeMeasure Incident Customer Impact by Plan
How many accounts were affected by the incident in each plan?
Open recipeCustomer evidence
Related workflows described by customers
Next step
Create the API key your agent will use
The free plan is enough to run the prompt, send test events, and review the first dashboard.
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A focused prompt that asks Codex to instrument the rest of the product, verify events, and summarize coverage gaps.
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