# KnownFix (remote · knownfix-backend-28.b-hash88.deno.net)

Verified dev-error fixes sold per-lookup to AI agents on-chain. Free search; 3 free samples.

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-20

## Components

- remote · `knownfix-backend-28.b-hash88.deno.net`: 65/100 (this document), [markdown](https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28.md), [page](https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28)
- npm · `knownfix`: 38/100, [markdown](https://verifymcp.io/servers/b-hash88-knownfix/knownfix.md), [page](https://verifymcp.io/servers/b-hash88-knownfix/knownfix)

## Channel facts

- Endpoint: `https://knownfix-backend-28.b-hash88.deno.net/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.1`

## 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 2026-08-20.

- **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 8 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**: 77/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 786 tokens (~98/item across 8 items; 8 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 92/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 75% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http b-hash88-knownfix https://knownfix-backend-28.b-hash88.deno.net/mcp
```

### Codex

```toml
[mcp_servers.b-hash88-knownfix]
url = "https://knownfix-backend-28.b-hash88.deno.net/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "b-hash88-knownfix": {
      "type": "remote",
      "url": "https://knownfix-backend-28.b-hash88.deno.net/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add b-hash88-knownfix --url https://knownfix-backend-28.b-hash88.deno.net/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  b-hash88-knownfix:
    url: "https://knownfix-backend-28.b-hash88.deno.net/mcp"
```

### Other

```json
{
  "mcpServers": {
    "b-hash88-knownfix": {
      "type": "http",
      "url": "https://knownfix-backend-28.b-hash88.deno.net/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.

### 2026-08-19 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-18 (score 64, 0)

- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “search_fixes” rewrote its description, which is the text the model reads
- [security] Tool “list_skills” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 79 → 98

### 2026-08-17 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-16 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-15 (score 62, 0)

- [functional regression] Schema quality: 417 → 636
- [functional improvement] Tool coverage: 67% → 75%
- [functional improvement] Stability: unverified → 0.03
- [functional] New tool “audit_endpoint”
- [functional] New tool “list_skills”
- [functional] New tool “get_skill”

### 2026-08-14 (score 62)

First indexed and scored.

## MCP tools (8)

### `search_fixes` (~82 tokens)

Search KnownFix for your error (free). Paste the error text verbatim; returns ranked candidates with confidence labels — and when the top match is one of the 10 free samples, its FULL fix body is included in the response, no payment. An empty result is an honest miss.

Input parameters:

- `query` (string, required): The error message or symptom, verbatim

### `list_catalog` (~30 tokens)

The full free tier: every error signature, title, tags, confidence, and which entries are free samples.

### `get_offer` (~26 tokens)

The machine-readable offer: price, treasury address, chain, and the exact redemption route.

### `get_fix` (~99 tokens)

Get a fix body. Free-sample entries return immediately. Paid entries need paymentTx: the hash of a mined payment of perFixWei to the treasury on Base mainnet chain 8453 (see get_offer). One payment redeems one fix.

Input parameters:

- `id` (string, required): Fix id from search_fixes or list_catalog
- `paymentTx` (string): 0x-prefixed tx hash of your on-chain payment (omit for samples)

### `list_skills` (~130 tokens)

Purchasable agent skills (free outline + provenance; body paid; each unique non-round price is the payment's join key). In stock: evm-payment-verification @ 0.00021037 ETH on Base (~$0.80); webflow-image-pipeline @ 0.00018743 ETH on Base (~$0.71); webflow-mcp-helper @ 0.00082951 ETH on Base (~$3.15); webflow-bundle @ 0.000915317 ETH on Base (~$3.48, vs 0.00101694 solo).

### `get_skill` (~84 tokens)

Buy a skill: pay its exact unique priceWei (see list_skills) to the treasury on chain 8453, then call with paymentTx. Returns the full SKILL.md. One payment, one skill delivery.

Input parameters:

- `id` (string, required): Skill id from list_skills
- `paymentTx` (string): 0x tx hash of your on-chain payment

### `audit_endpoint` (~83 tokens)

Free readiness audit of any agent-facing URL: MCP handshake, CORS, discovery docs (llms.txt, mcp.json), and payment-offer behavior. Returns a graded, machine-readable report with remediations. This is the check KnownFix ran on itself.

Input parameters:

- `url` (string, required): Base URL to audit, e.g. https://your-agent.example.com

### `submit_fix` (~136 tokens)

Offer a fix for the catalog. Submissions are reviewed by the operator before listing; include a reproduction so the fix can be verified rather than trusted. Revenue-sharing for accepted contributions is planned, not yet live — that is stated here so you can decide with open eyes.

Input parameters:

- `cause` (string)
- `contributor` (string): How to credit/reach you: name, URL, or wallet address
- `fix` (string, required)
- `reproduction` (string): How to reproduce the error and verify the fix
- `signature` (string, required): The exact error string a stuck agent would search
- `title` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28#diagnostics

## Score history

- 2026-08-20: 65
- 2026-08-19: 65
- 2026-08-18: 64
- 2026-08-17: 64
- 2026-08-16: 63
- 2026-08-15: 62
- 2026-08-14: 62

## Links

- Remote endpoint: https://knownfix-backend-28.b-hash88.deno.net/mcp
- Repository: https://github.com/b-hash88/knownfix
- Website: https://b-hash88.github.io/knownfix/
- Changelog RSS feed: https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28.xml
- Changelog JSON feed: https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28.json
- HTML version of this page: https://verifymcp.io/servers/b-hash88-knownfix/knownfix-backend-28