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Exactlane Preflight MCP server

online · 100% uptime
by exactlane.dev·dev.exactlane/preflight·v0.1.0
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Caller-specific static MCP capability fit evidence. No live probing; caller owns the decision.

A87/100grade A
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Safety scan
A87/100

full report

Adoption
Growing

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Exactlane Preflight tools (1)

write = sends, deletes, buys or posts
  • check_mcp_capabilityFree

    Before relying on an MCP capability, answer one question about it: does this exact revision satisfy the requirements your workflow declares? Call it for new work, after a dependency changes, after your own requirements change, or when an integration has already failed and you need to know whether the capability is why (the public triggers are NEW_WORK, DEPENDENCY_CHANGE, REQUIREMENTS_CHANGE, INTEGRATION_FAILURE, OTHER_REAL_WORK). You supply both sides: a capability snapshot you already hold and your workflow requirements. Nothing is fetched and no endpoint is probed, so the answer is reproducible from what you sent and is only ever as good as that snapshot. You get back a verdict with per-check results, coverage, and the limits of the check itself. That is evidence, not an instruction: the caller owns CONTINUE, UPDATE_INTEGRATION, and HOLD, and no verdict maps to any of them. Optional previous (an earlier snapshot and its finished report) adds a revision_receipt comparing that conclusion with this revision. Budget before calling: a Preview grant allows three checks, while POST /v0/snapshot-lint validates argument and requirements shape with no credential and no quota, so start there when unsure. This tool never writes usage-events (usage_event_created is always false) and never discloses the internal Preview bearer; attest your own decision afterwards on a finished owned check.

Public scan report

scanner v0.1.10 · 2026-10-14 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 3153ms17/20
  • Tool poisoning1 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 5 days ago15/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Exactlane Preflight compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
87/100
higher than 73% of 48,255 servers
Tools
1
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
853 ms
faster than 15% of 30,031 servers

What its tools let an agent do: 1 read

Install Exactlane Preflight in Claude Code, Cursor or VS Code

claude mcp add --transport http preflight https://exactlane.dev/mcp
Add to Cursor

What the publisher says

From the Exactlane Preflight repository's README, as published. We do not edit it. Read it on GitHub

Exactlane Preflight

The check before the call.

Caller-specific static compatibility evidence for autonomous agents evaluating an MCP capability before relying on it.

Exactlane helps an agent answer: does this exact declared MCP capability fit my bounded workflow requirements? before integration.

Problem it addresses

Before an autonomous agent depends on an external MCP capability, it often needs a pre-integration compatibility check:

  • compare a caller-provided capability snapshot to caller-specific requirements;
  • obtain static compatibility evidence (not live probing);
  • keep the operational decision with the caller.

Exactlane Preflight is a Phase 0A public service for that workflow.

Use when

An agent has a caller-provided MCP capability snapshot and needs to determine whether that exact declared capability fits its own bounded workflow requirements.

Does not prove

  • live availability
  • full MCP conformance
  • business-result correctness
  • provider trust
  • security certification
  • payment success

Exactlane Preflight is primarily a REST evidence service with a thin remote MCP adapter at /mcp. It is not an A2A agent, marketplace, or certification authority.

Live machine contract

Canonical public discovery origin:

  • Service root: https://exactlane.dev/
  • Manifest: https://exactlane.dev/.well-known/exactlane.json
  • OpenAPI: https://exactlane.dev/openapi.json
  • Agent discovery text: https://exactlane.dev/llms.txt
  • Sitemap: https://exactlane.dev/sitemap.xml
  • Remote MCP: https://exactlane.dev/mcp

Snapshots of these documents are mirrored in discovery/ so they can be read and diffed here. The live endpoints above are authoritative; the snapshots are regenerated from the deployed commit.

Notes

  • MCP tool schemas that are valid on one side and unusable on the other: sourced cases where hosts or clients silently drop or reject tool schemas, and what Preflight can and cannot check about them.

Scope of this repository

Public discovery anchor and reference notes.

Source implementation is not part of this public discovery repository.

Official MCP Registry

  • Server name: dev.exactlane/preflight
  • Version: 0.1.0
  • Remote: Streamable HTTP https://exactlane.dev/mcp
  • Registry search: https://registry.modelcontextprotocol.io/v0.1/servers?search=exactlane

Primary tool: checkmcpcapability (adapter over Exactlane Phase 0A; no live probing; caller owns CONTINUE/UPDATE/HOLD).

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-10-14restoreD → Ascore 87

Exactlane Preflight: common questions

Is Exactlane Preflight MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the Exactlane Preflight safety report
How do I install Exactlane Preflight?
It runs remotely at exactlane.dev. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Exactlane Preflight need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Exactlane Preflight maintained?
The last commit was 26 days ago (2026-10-09). The latest release is v0.1.0.
Is Exactlane Preflight up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Exactlane Preflight compare with other MCP servers?
safety score 87/100 (higher than 73% of 48,255 servers); tools 1 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.