API Monitor

Run a live endpoint check immediately, then unlock latency benchmarking and contract validation once you move into a SynapWatch workspace.

Live endpoint checks
Guest-safe launch access
Workspace benchmarks
Test an endpoint nowSee sample responseCreate free account

Tool Context

API Monitor sits in Core Monitoring

API Monitor helps validate the backend dependencies behind user journeys, starting with one-off live checks and moving into richer workspace workflows when you need more depth.

Core Monitoring

DNS, SSL, performance, API, and related health checks.

Core Monitoring

DNS, SSL, performance, API, and related health checks.

Deep Validation

Security, content, synthetic journeys and sitemap quality.

Operations and Reporting

Workspace-first alerts, incidents, and stakeholder reporting workflows.

Suggested workflow

Three steps

  1. 1

    Define request

  2. 2

    Run health and speed checks

  3. 3

    Validate response shape

Quick Navigate

Related tools

8 links

SSL Monitor

Try + unlock more

Watch certificate validity and expiry windows.

Performance Monitor

Try + unlock more

Measure response timing, first-byte latency, and delivery behavior.

DNS Monitor

Try now

Verify A, MX, NS and related DNS records.

API Monitor

Try + unlock more

Validate API availability, response codes and latency.

Security Monitor

Try now

Check security posture and scan for vulnerabilities.

Content Validator

Try now

Validate critical content and regex-driven checks.

Synthetic Monitor

Ops workflow

Monitor multi-step HTTP workflows and scripted checks.

Sitemap Parser

Try now

Parse XML sitemaps and audit indexed URL sets.

Launch Access

Guests can try the tools, while signed-in workspaces keep the durable state

Current session: Guest

Guest access

Guests can run live endpoint checks with tighter caps and safe-method limits during launch.

Logged-in workspace

Logged-in workspaces unlock broader methods, latency benchmarks, contract validation, and higher daily room.

API Monitor now starts with a real guest-safe endpoint test instead of a hard login wall.

View launch pricing

Request Builder

Run a live endpoint check

Guests can verify one endpoint live right from this page. Logged-in workspaces unlock broader methods, latency benchmarking, and contract validation.

SynapWatch now reuses this same request definition across live checks, latency benchmarks, and contract validation. If you benchmark a mutating method, the exact request is replayed for every selected run.

Modes

Guest live check

One-off endpoint reachability with safe methods and immediate response inspection.

Workspace checks

Benchmarks and contract validation reuse the same method, headers, and JSON body from the builder.

Workspace features

Benchmark mode repeats the current request and summarizes the spread. Contract mode compares the JSON response against your expected schema using nested objects, arrays, optional keys with ?, and union types like "string|null".

Example schema: {"status":"string","meta?":{"region":"string|null"},"items":[{"id":"number"}]}

Sample response preview

This sample shows the response layout before you run a live endpoint check.

Status

200 OK

Duration

182 ms

Checked

Mar 14, 2026, 10:45 AM

Response headers

{
  "content-type": "application/json; charset=utf-8",
  "cache-control": "no-store",
  "server": "edge-gateway"
}

Response body

{
  "status": "ok",
  "region": "global",
  "version": "2026.03"
}

Benchmark

Guests can run the live endpoint check immediately. Latency benchmarking unlocks after you create a free account.

Contract check

Guests can prove endpoint reachability first. Contract validation opens after you create a free account.