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Agent Preflight

R0· no sign-in

Budgeted agent preflight: allow|block|reuse|defer|advise. Never executes destination tools. Free MCP

v0.2.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality96strong
Trust82of 100
Uptime, 30 days97%
Latency p50338 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "agent-preflight": {
      "type": "http",
      "url": "https://api.agent-preflight.com/mcp"
    }
  }
}
claude mcp add --transport http agent-preflight https://api.agent-preflight.com/mcp
[mcp_servers.agent-preflight]
url = "https://api.agent-preflight.com/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "agent-preflight": {
      "type": "remote",
      "url": "https://api.agent-preflight.com/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "agent-preflight": {
      "type": "http",
      "url": "https://api.agent-preflight.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=agent-preflight&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLmFnZW50LXByZWZsaWdodC5jb20vbWNwIn0%3D"
}
{
  "servers": {
    "agent-preflight": {
      "type": "http",
      "url": "https://api.agent-preflight.com/mcp"
    }
  }
}
{
  "mcpServers": {
    "agent-preflight": {
      "httpUrl": "https://api.agent-preflight.com/mcp"
    }
  }
}
extensions:
  "agent-preflight":
    enabled: true
    name: "agent-preflight"
    type: streamable_http
    uri: "https://api.agent-preflight.com/mcp"
    timeout: 300

Quality 96 / 100strong

protocol88 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • warn
    protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations2 of 2 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 1,104 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changes2 tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

2 tools, about 1,104 tokens to load them all · tool set 98afc1391985 · tools last changed 2026-10-04 · checked 2026-10-20 12:13 UTC

Tool changes

  • preflight_tool_callchangeddescription
    before

    Free MCP decision for generic search:web_search or browse:fetch proposals only. Returns structuredContent and JSON text, never destination results. Caller supplies cost estimates, post-consultation budget and history, executes tools and retrieves resultReference itself. Reuse requires explicit permission, positive TTL and matching nonempty goal hashes; history must belong to the caller. estimated fees/savings are hypothetical, not receipts; confidence is not calibrated. Paid HTTP is a separate $0.001 per settled POST interface. Full contract: https://agent-preflight.com/docs

    after · 97% of words in common

    Free MCP decision for generic search:web_search or browse:fetch proposals only. Returns structuredContent and JSON text, never destination results. Caller supplies cost estimates, post-consultation budget and history, executes tools and retrieves resultReference itself. Reuse requires explicit permission, positive TTL and matching nonempty goal hashes; history must belong to the caller. estimated fees/savings are hypothetical, not receipts; confidence is not calibrated. Paid HTTP is a separate $0.002 per settled POST interface. Full contract: https://agent-preflight.com/docs

  • check_requestchangeddescription, input schema
    before

    Validate an HTTP API request body against a supplied JSON Schema before sending it. This tool does not execute the request. Use it when an agent needs to determine whether a proposed JSON body satisfies its expected schema. Optional economics adds proceed/abort advice from expected waste versus a $0.001 check.

    after · 96% of words in common

    Validate an HTTP API request body against a supplied JSON Schema before sending it. This tool does not execute the request. Use it when an agent needs to determine whether a proposed JSON body satisfies its expected schema. Optional economics adds proceed/abort advice from expected waste versus a $0.002 check.

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 82 / 100

no-repository
provenance55
liveness99
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-97% +updated-30d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://api.agent-preflight.com/mcp streamable-httpnoneyes97%338 ms2026-07-282026-10-20

Tools (2)

check_requestread-onlyValidate an HTTP API request body against a supplied JSON Schema before sending it. This tool does not execute the request. Use it when an agent needs to determine whether a proposed JSON body satisfies its expected schema. Optional economics adds proceed/abort advice from expected waste versus a $0.002 check.
preflight_tool_callread-onlyFree MCP decision for generic search:web_search or browse:fetch proposals only. Returns structuredContent and JSON text, never destination results. Caller supplies cost estimates, post-consultation budget and history, executes tools and retrieves resultReference itself. Reuse requires explicit permission, positive TTL and matching nonempty goal hashes; history must belong to the caller. estimated fees/savings are hypothetical, not receipts; confidence is not calibrated. Paid HTTP is a separate $0.002 per settled POST interface. Full contract: https://agent-preflight.com/docs

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "com.agent-preflight/agent-preflight",
  "title": "Agent Preflight",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api.agent-preflight.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.2.0",
  "websiteUrl": "https://agent-preflight.com",
  "description": "Budgeted agent preflight: allow|block|reuse|defer|advise. Never executes destination tools. Free MCP"
}