# FACTRAIL

> Evidence infrastructure for agents: source-backed company verification and beta import assessment.

- name: io.github.baronsigma/factrail
- version: 2.4.1
- connection class: R0 (autonomous)
- trust: 96/100
- quality: 79/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.baronsigma%2Ffactrail
- tools: https://api.protogrid.dev/v1/servers/io.github.baronsigma%2Ffactrail/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "factrail": {
      "type": "http",
      "url": "https://mcp.factrail.online/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 98
- freshness: 100
- provenance: 90
- drivers: +repository +namespace-matches-repo +website +reachable +uptime-95% +updated-21d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (good)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 7 of 7 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 2,129 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 25 (weight 15)

- warn `stability.changes`: 14 tool changes in 30 days
- fail `stability.rug_pull`: 7 tools kept their name but changed most of their description in 30 days; review before trusting them

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 7, about 2,129 tokens to load them all
- tool set hash: 6145d106189286c5fd73d621eedcf108
- tools last changed: 2026-09-29T09:36:36.644Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.baronsigma/factrail.svg)](https://protogrid.dev/servers/io.github.baronsigma/factrail)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-09-29 `analyze_company` changed (title, description, inputSchema, annotations) **meaning changed**
  - before: Legacy experimental company analysis. Financial and credit figures are placeholders, not verified risk assessments.
  - after: Deprecated: use factrail_verify instead. Use only when an older integration still calls this experimental tool; financial and credit data sources are unavailable and returned fields are null.
- 2026-09-29 `assess_import` changed (title, description, annotations) **meaning changed**
  - before: Legacy EU import assessment response with classification, duty, VAT, compliance, landed cost, and missing inputs. Use factrail_assess for an EvidenceEnvelope. Results are indicative and are not binding customs rulings.
  - after: Deprecated: use factrail_assess instead. Use when an older integration still expects the legacy beta EU import assessment format; coverage may be partial or provisional and this is not a binding customs result.
- 2026-09-29 `verify_french_company` changed (title, description, annotations) **meaning changed**
  - before: Verify a French company by SIREN (9-digit) or SIRET (14-digit). Returns structured verified data from INSEE Sirene (official company register) with BODACC company-event intelligence (legal notices, proceedings, filings). Legacy response shape; use factrail_verify for an EvidenceEnvelope.
  - after: Deprecated: use factrail_verify instead. Use when an older integration still expects the legacy flat French company lookup by SIREN/SIRET; kept callable for compatibility only.
- 2026-09-29 `factrail_get_receipt` changed (title, description, outputSchema, annotations) **meaning changed**
  - before: Retrieve the immutable EvidenceEnvelope associated with a FACTRAIL receipt ID.
  - after: Use when you need to re-fetch or audit a previously returned FACTRAIL result by its receipt ID. Recomputes the stored EvidenceEnvelope's content hash and rejects altered content; this checks integrity, not truth.
- 2026-09-29 `factrail_verify` changed (title, description, outputSchema, annotations) **meaning changed**
  - before: Establish evidence-backed facts about a supported subject. Supports French companies by SIREN or SIRET; returns facts, provenance, coverage, and a receipt.
  - after: Use when you need verified, source-backed facts about a French company from its SIREN or SIRET. Returns Evidence with provenance, freshness, coverage, conflicts, and a reusable receipt.
- 2026-09-29 `factrail_assess` changed (title, description, inputSchema, outputSchema, annotations) **meaning changed**
  - before: Perform an evidence-backed structured assessment. Supports import scenarios and returns an EvidenceEnvelope with source coverage and a receipt.
  - after: Use when you need a source-backed assessment of importing a product into the EU (tariff classification, duties, and related evidence). Returns an EvidenceEnvelope; import assessment is Beta and results expose source coverage and support levels.
- 2026-09-29 `factrail_capabilities` added
  - Use when you need to discover what FACTRAIL can verify or assess before calling another tool. Returns available capabilities, inputs, fields, sources, versions, and limitations; call first to inspect current coverage and source state.
- 2026-09-27 `analyze_company` added
  - Legacy experimental company analysis. Financial and credit figures are placeholders, not verified risk assessments.
- 2026-09-27 `assess_import` changed (description) **meaning changed**
  - before: Assess an import into the EU from any origin country. France is the best-supported destination in V0. Returns structured classification, customs duty, import VAT, compliance requirements, landed cost, missing-information questions, risk profile, and source-backed evidence. This is a pre-purchase / pre-import decision tool — it does NOT file customs declarations, book freight, or track shipments. Returned classifications are NOT legally binding and must be reviewed before use in customs filings. Where information is missing or a source is unavailable, the tool returns explicit questions and unavailable markers rather than fabricated data.
  - after: Legacy EU import assessment response with classification, duty, VAT, compliance, landed cost, and missing inputs. Use factrail_assess for an EvidenceEnvelope. Results are indicative and are not binding customs rulings.
- 2026-09-27 `verify_french_company` changed (description)
  - before: Verify a French company by SIREN (9-digit) or SIRET (14-digit). Returns structured verified data from INSEE Sirene (official company register) with BODACC company-event intelligence (legal notices, proceedings, filings). Read-only — does not modify any state. Accesses open-world data sources including the French government's official APIs.
  - after: Verify a French company by SIREN (9-digit) or SIRET (14-digit). Returns structured verified data from INSEE Sirene (official company register) with BODACC company-event intelligence (legal notices, proceedings, filings). Legacy response shape; use factrail_verify for an EvidenceEnvelope.

Full history: https://api.protogrid.dev/v1/servers/io.github.baronsigma%2Ffactrail/changes

## Remotes

- https://mcp.factrail.online/mcp (streamable-http, auth none, reachable true, uptime30d 0.95098037)

## Packages

_none_

## Tools (7)

- `analyze_company`: Deprecated: use factrail_verify instead. Use only when an older integration still calls this experimental tool; financial and credit data sources are unavailable and returned fields are null.
- `assess_import`: Deprecated: use factrail_assess instead. Use when an older integration still expects the legacy beta EU import assessment format; coverage may be partial or provisional and this is not a binding customs result.
- `factrail_assess`: Use when you need a source-backed assessment of importing a product into the EU (tariff classification, duties, and related evidence). Returns an EvidenceEnvelope; import assessment is Beta and results expose source coverage and support levels.
- `factrail_capabilities`: Use when you need to discover what FACTRAIL can verify or assess before calling another tool. Returns available capabilities, inputs, fields, sources, versions, and limitations; call first to inspect current coverage and source state.
- `factrail_get_receipt`: Use when you need to re-fetch or audit a previously returned FACTRAIL result by its receipt ID. Recomputes the stored EvidenceEnvelope's content hash and rejects altered content; this checks integrity, not truth.
- `factrail_verify`: Use when you need verified, source-backed facts about a French company from its SIREN or SIRET. Returns Evidence with provenance, freshness, coverage, conflicts, and a reusable receipt.
- `verify_french_company`: Deprecated: use factrail_verify instead. Use when an older integration still expects the legacy flat French company lookup by SIREN/SIRET; kept callable for compatibility only.