Trace-first debugging
Start from a failed request and follow every span across services, jobs, queries, and third-party calls.
Request-aware observability for backend teams
Understand backend failures in seconds
Grepline connects API requests, database queries, background jobs, and third-party calls into one clear execution timeline — so you can find the root cause faster.
API traces • Database queries • Background jobs • Third-party calls
Trace #req_48291
Failed checkoutOne request connected across API, database, queue, and third-party payment service.
Total duration
5.2s
Failed span
Stripe API
Queries
7
Services touched
4
Execution timeline
7 spans captured for this request
POST /api/checkout
Checkout request accepted from web client.
34msStarted
Auth middleware
Session and account permissions verified.
18msOK
Inventory query
Reserved 3 line items from warehouse replica.
126msOK
Stripe payment call
Third-party payment gateway exceeded request timeout.
4.8sTimeout
Queue email_receipt
Receipt job skipped because payment never completed.
42msSkipped
Database write
Order transaction rolled back after payment failure.
93msRolled back
Response 500
Checkout returned internal server error to client.
5msFailed
Stripe API timeout
Detected bottleneck
Root cause: third-party payment call exceeded timeout after 4.8s, causing checkout request to fail.
Service path
1web-api
2auth-service
3postgres
4stripe
5worker
Logs matched
payment.timeout gateway=stripe
order.rollback req=req_48291
response.status code=500
order.rollback req=req_48291
response.status code=500
Production ready workflows
Built for developers who need answers when production breaks
Grepline follows the real debugging loop: capture the full execution path, surface the failing span, and explain what caused the request to fail.
Designed for backend teams
Capture the execution path across APIs, workers, databases, and external services without stitching signals manually.
Production failure context
Connect API traces, database spans, worker jobs, external calls, and root-cause summaries in one view.
Built for production backends
Every failure has a path. Grepline shows it.
Full request timelines
Follow every API request across middleware, services, queues, and external calls in one ordered view.
Database query visibility
See slow queries, duplicate calls, rollbacks, and the code path that triggered them.
Background job tracing
Connect async workers and scheduled jobs back to the original request or system event.
Root cause explanations
Grepline highlights the span that broke the flow and explains the failure in plain developer terms.
Stop digging through scattered logs.
See the full execution path of every request, job, and failure in one place.