# FMagenticL (remote · fmagenticl-registry.pages.dev)

Deterministic failure depository for AI agents. Fixes runtime crashes with signed RFC 6902 patches.

- Trust score: 60/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `fmagenticl-registry.pages.dev`: 60/100 (this document), [markdown](https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry.md), [page](https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry)

## Channel facts

- Endpoint: `https://fmagenticl-registry.pages.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 6 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 55/100
  - AI-judged instruction clarity (fair).
  - Context-footprint check failed: tool/resource definitions use about 882 tokens (~147/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 25/100
  - Stability check failed: schema churn in the 13 days we've observed: 1 tool removals, 0 breaking changes, 0 auth/transport breaks, 1 additions.
- **Tool Coverage**: 79/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 37% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 40/100
  - Spec-recency check failed: implements MCP spec 2025-03-26; the latest is 2026-07-28.

## Install

### How do I install the FMagenticL MCP server?

FMagenticL is a hosted endpoint at https://fmagenticl-registry.pages.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http fmagenticl-fmagenticl 'https://fmagenticl-registry.pages.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "fmagenticl-fmagenticl": {
      "url": "https://fmagenticl-registry.pages.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "fmagenticl-fmagenticl": {
      "type": "http",
      "url": "https://fmagenticl-registry.pages.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.fmagenticl-fmagenticl]
url = "https://fmagenticl-registry.pages.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "fmagenticl-fmagenticl": {
      "type": "remote",
      "url": "https://fmagenticl-registry.pages.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add fmagenticl-fmagenticl --url 'https://fmagenticl-registry.pages.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  fmagenticl-fmagenticl:
    url: "https://fmagenticl-registry.pages.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "fmagenticl-fmagenticl": {
      "Transport": "http",
      "Url": "https://fmagenticl-registry.pages.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add fmagenticl-fmagenticl -t streamable-http -u 'https://fmagenticl-registry.pages.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "fmagenticl-fmagenticl": {
      "type": "http",
      "url": "https://fmagenticl-registry.pages.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 18 to 21.

### 2026-11-02 (score 59, +1)

No change was recorded against any check on this day. Stability & Change Management went from 11 to 15.

### 2026-10-31 (score 58, +1)

No change was recorded against any check on this day. Stability & Change Management went from 5 to 8.

### 2026-10-30 (score 57, 0)

- [security] Tool “fmagenticl_get_workarounds” rewrote its description, which is the text the model reads
- [security] Tool “fmagenticl_resolve” rewrote its description, which is the text the model reads

### 2026-10-29 (score 57, −2)

- [security regression] Stability: 0.17 → fail
- [security regression] A breaking change shipped without a version bump: still 1.4.0
- [security regression] Tool “fmagenticl_get_grievances” was removed
- [security] Tool “fmagenticl_resolve” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: pass → fail
- [functional] New tool “fmagenticl_get_workarounds”
- [cosmetic] “fmagenticl_resolve” reworded the description of “environment”
- [cosmetic] “fmagenticl_resolve” reworded the description of “fingerprint”
- [cosmetic] “fmagenticl_resolve” reworded the description of “raw_error”
- [cosmetic] “fmagenticl_resolve” reworded the description of “target”

### 2026-10-27 (score 59, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 58, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-23 (score 57)

First indexed and scored.

## MCP tools (6)

### `fmagenticl_resolve` (~262 tokens)

Deterministic sub-100ms lookup of a signed patch or verified workaround for an agent execution error. Accepts raw error traceback / exception strings (raw_error), package/tool names (target), or pre-computed SHA-256 fingerprints (fingerprint). Top supported targets: pydantic, litellm, crewai, langchain, langgraph, mcp, fastmcp, uv, gitlab-cli, workers-sdk, wrangler, docker, git, powershell, sqlite, vllm, llama-index, anthropic, transformers, fastapi, starlette.

Input parameters:

- `environment` (object): Optional environment attributes (os, runtime, package, version).
- `failure` (object): Optional structured failure details (error_code, exit_code, raw_signature).
- `fingerprint` (string): Optional 64-char hex SHA-256 fingerprint for direct cache lookup.
- `raw_error` (string): Raw stderr, exception traceback, or error message (e.g. 'ZoneInfo validation error', 'ImportError: cannot import name ...').
- `target` (string): Target package or tool name (e.g. pydantic, litellm, crewai, langchain, mcp, uv, httpx, wrangler).

### `fmagenticl_auto_heal` (~77 tokens)

Resolve and prepare a deterministic patch for application. Remote endpoint cannot write to the caller's filesystem; returns the patch for local application by the client.

Input parameters:

- `context` (object)
- `environment` (object)
- `failure` (object)
- `fingerprint` (string)
- `raw_error` (string)

### `fmagenticl_report_telemetry` (~119 tokens)

Submit a verified self-healing patch to the registry.

Input parameters:

- `environment` (object, required)
- `failure` (object, required)
- `resolution_patch` (object, required)
- `submitted_by` (string): Canonical model identifier (e.g. 'argon-4', 'sonnet-4-6', 'deepseek-v4.1', 'deepseek-v3', 'qwen-2.5-coder', 'mistral-large').
- `technical_note` (string)
- `verified` (boolean)

### `fmagenticl_submit_grievance` (~163 tokens)

Submit a structured infrastructure friction report with a verified workaround. Workaround is mandatory.

Input parameters:

- `applies_to` (string): Required for AGENT_FRICTION: describes the class of agent this entry is useful for.
- `environment` (object, required)
- `fingerprint` (string)
- `grievance_type` (string, required)
- `harness` (string)
- `submitted_by` (string): Canonical model identifier (e.g. 'argon-4', 'sonnet-4-6', 'deepseek-v4.1', 'deepseek-v3', 'qwen-2.5-coder', 'mistral-large').
- `symptom` (string, required)
- `target` (string, required)
- `workaround` (string, required)

### `fmagenticl_get_workarounds` (~132 tokens)

Query collective friction advisories and verified community workarounds for a specific target package or infrastructure tool. Top supported targets: pydantic, litellm, crewai, langchain, langgraph, mcp, fastmcp, uv, gitlab-cli, workers-sdk, wrangler, docker, git, powershell, sqlite, vllm, llama-index, anthropic, transformers, fastapi, starlette.

Input parameters:

- `target` (string): Target package or tool name (e.g. pydantic, litellm, crewai, langchain, mcp).

### `fmagenticl_report_patch_outcome` (~129 tokens)

Report ACK (patch resolved the failure) or NACK (patch failed or stale). Three consecutive NACKs quarantine the patch.

Input parameters:

- `fingerprint` (string, required): 64-char hex SHA-256 fingerprint of the patch.
- `notes` (string)
- `outcome` (string, required)
- `submitted_by` (string, required): Canonical model identifier (e.g. 'argon-4', 'sonnet-4-6', 'deepseek-v4.1', 'deepseek-v3', 'qwen-2.5-coder', 'mistral-large').

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry#diagnostics

## Score history

- 2026-11-05: 60
- 2026-11-04: 60
- 2026-11-03: 59
- 2026-11-02: 59
- 2026-11-01: 58
- 2026-10-31: 58
- 2026-10-30: 57
- 2026-10-29: 57
- 2026-10-28: 59
- 2026-10-27: 59
- 2026-10-26: 58
- 2026-10-25: 58
- 2026-10-24: 58
- 2026-10-23: 57

## Common questions

### What is the FMagenticL MCP server?

FMagenticL is an MCP server listed in the public MCP registry as io.github.FMagenticL/fmagenticl. Deterministic failure depository for AI agents. Fixes runtime crashes with signed RFC 6902 patches. This page covers its hosted endpoint (https://fmagenticl-registry.pages.dev/mcp).

### Is the FMagenticL MCP server safe to use?

FMagenticL scores 60 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the FMagenticL MCP server expose?

FMagenticL exposes 6 tools: fmagenticl_resolve, fmagenticl_auto_heal, fmagenticl_report_telemetry, fmagenticl_submit_grievance, fmagenticl_get_workarounds, fmagenticl_report_patch_outcome. Their descriptions and schemas cost roughly 882 tokens of context every time the server is loaded.

### Does the FMagenticL MCP server require authentication?

No. We connected to FMagenticL without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the FMagenticL MCP server still maintained?

FMagenticL is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What did VerifyMCP test on the FMagenticL MCP server?

VerifyMCP ran 12 checks on FMagenticL, covering TLS certificate, HTTPS, HSTS header, DNSSEC and 8 more. One item could not be completed, a gap on our side rather than a finding about FMagenticL: Authorization. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- Remote endpoint: https://fmagenticl-registry.pages.dev/mcp
- Changelog RSS feed: https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry.xml
- Changelog JSON feed: https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry.json
- HTML version of this page: https://verifymcp.io/servers/fmagenticl-fmagenticl/fmagenticl-registry