FetchSandbox
by fetchsandbox.com in Security & trust
A deterministic verification engine for agents. Proves a fix: fails on the old code, passes on new.
https://fetchsandbox.com/mcp/v1- Tools
- 8
- open to any client
- Uptime
- 100%
- last 30 days
- Response time
- 869 ms
- 1.0 s slowest 5%
- Last check
- Passed
- 2 h ago, next in 5 h
Reliability
Status and outage history · Atom feed · Watch with other listings
How to connect
Add it to any MCP client that supports remote servers.
{
"mcpServers": {
"fetchsandbox": {
"type": "http",
"url": "https://fetchsandbox.com/mcp/v1"
}
}
}8 tools
- coach
Conversational integration coach for FetchSandbox. Server-side orchestrator that walks the user through adding an API integration (payments / email / auth / etc.) — intake the goal, elicit domain-aware discovery questions from the spec's brain.yaml, route to the right workflow…
- get_job
Retrieve the SAME running find_bugs, fix_bug, prove_fix, verify_behavior or validate_integration job (including requirements planning). Follow next_tool_call until status is done or error. Never restart the original tool to poll. A proposed plan is not execution proof; a running…
- guide
ROUTE a symptom to the provider behaviour that explains it. Use this when the user names a provider or a domain (payments, email, auth, SMS, subscriptions) and you need to know what that provider ACTUALLY does — not what its docs say, and not what can be inferred from reading…
- quickrun
Run a curated reference workflow against a KNOWN, bundled spec (stripe, clerk, descope, resend, twilio, and 50+ others) in ONE call — it spins up the sandbox by slug, so you do NOT need import_spec or a sandbox_id first. Use this when exploring the bundled provider contract…
- validate_integration
Completion rule: a request to verify an app includes its applicable failure checks without another user prompt. When verification_continuation.required is true, continue in this agent: inspect pending_checks, preserve every declared check and its assertions, implement supported…
- list_workflows
List the named, runnable workflows for a known provider slug or imported spec. Workflows are realistic multi-step API journeys (e.g. 'create customer → attach payment method → create subscription'). Known provider slugs need no import. Use this for exploration ("what can I do?"…
- run_workflow
Execute ONE specific workflow by name and return its step-by-step trace PLUS a `share_url` — a public, replayable proof URL that renders the full timeline (every request, response, webhook event) for this run. The share_url is the canonical 'here's what happened' artifact…
- verify_behavior
Prove a known fix survives a bug — the 'prove' half of reproduce→prove. The backend spawns a buggy AND a fixed reference handler and fires the bug_pattern's probes at both, returning the side-by-side diff (e.g. the buggy handler double-charges on a duplicate webhook, the fixed…
Security scan
2 findings
- Unusually long description in tool:coach
coach Conversational integration coach for FetchSandbox. Server-side orchestrato… - Unusually long description in tool:validate_integration
validate_integration (validate integration) Completion rule: a request to verify…
Recent checks
| When | Result | HTTP | Time |
|---|---|---|---|
| 2 h ago | Passed | 200 | 1.0 s |
| 13 h ago | Passed | 200 | 874 ms |
| 24 h ago | Passed | 200 | 869 ms |
| 36 h ago | Passed | 200 | 852 ms |
| 47 h ago | Passed | 200 | 813 ms |
Show 10 older checks
| 2 days ago | Passed | 200 | 878 ms |
| 3 days ago | Passed | 200 | 914 ms |
| 4 days ago | Passed | 200 | 810 ms |
| 4 days ago | Passed | 200 | 827 ms |
| 5 days ago | Passed | 200 | 938 ms |
| 6 days ago | Passed | 200 | 877 ms |
| 6 days ago | Passed | 200 | 820 ms |
| 7 days ago | Passed | 200 | 990 ms |
| 7 days ago | Passed | 200 | 891 ms |
| 8 days ago | Passed | 200 | 1.0 s |