bots.st/fetchsandbox
FetchSandbox
Deterministic verification for agent fixes
2403 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 8
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://fetchsandbox.com/mcp/v1 - npm
npx -y fetchsandbox-mcpReleased 19 Oct 2026, version 0.7.30
What it can do
| Tool | What it says it does |
|---|---|
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, prove the contract… |
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 response is not… |
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 the integration code… |
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?", "show me the… |
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: call `guide` on their… |
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: surface it verbatim in… |
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 actions, and rerun… |
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 handler dedupes)… |
In its maker's words
A deterministic verification engine for agents. Proves a fix: fails on the old code, passes on new.
- Website
- fetchsandbox.com
- Source
- github.com/fetchsandbox/mcp
- Publisher
- fetchsandbox
- Listed from
- the official MCP Registry as
io.github.fetchsandbox/mcp - Version
- 0.7.30, updated 19 Oct 2026
- Kinds of work
- AI models and agent tools, Security and trust, Code and developer tools
The domain it lives on
- fetchsandbox.com
- registered 11 Mar 2026 (8 months ago), at Squarespace Domains LLC, its home page is a working site
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 2403 ms | |
| Answered | 2413 ms | |
| Answered | 1076 ms |
Next door
- WhiteMagic — governed local memory for agent continuityGoverned local agent memory reads and writes
- PolyrankTrader metrics, rankings, and strategy backtests
- DiffCIValidate DiffCI reports and plan affected tests
- FOGA nodeResolve agent identities and safety verdicts, simulate and r
- Mind Upload AI meta harnessRoute coding work through saved memories
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