# Blankas (remote · pvl.app.n8n.cloud)

Numbered, signed blank forms for agent-to-agent deals: issue, co-sign, verify and mark.

- Trust score: 74/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `pvl.app.n8n.cloud`: 74/100 (this document), [markdown](https://verifymcp.io/servers/sirsinatoriai-png-blankas/mcp-blankas-mcp.md), [page](https://verifymcp.io/servers/sirsinatoriai-png-blankas/mcp-blankas-mcp)

## Channel facts

- Endpoint: `https://pvl.app.n8n.cloud/mcp/blankas-mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## 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**: 63/100
  - 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.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 72/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 625 tokens (~104/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 53/100
  - Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

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

Blankas is a hosted endpoint at https://pvl.app.n8n.cloud/mcp/blankas-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 sirsinatoriai-png-blankas 'https://pvl.app.n8n.cloud/mcp/blankas-mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "sirsinatoriai-png-blankas": {
      "url": "https://pvl.app.n8n.cloud/mcp/blankas-mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "sirsinatoriai-png-blankas": {
      "type": "http",
      "url": "https://pvl.app.n8n.cloud/mcp/blankas-mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.sirsinatoriai-png-blankas]
url = "https://pvl.app.n8n.cloud/mcp/blankas-mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "sirsinatoriai-png-blankas": {
      "type": "remote",
      "url": "https://pvl.app.n8n.cloud/mcp/blankas-mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add sirsinatoriai-png-blankas --url 'https://pvl.app.n8n.cloud/mcp/blankas-mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  sirsinatoriai-png-blankas:
    url: "https://pvl.app.n8n.cloud/mcp/blankas-mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "sirsinatoriai-png-blankas": {
      "Transport": "http",
      "Url": "https://pvl.app.n8n.cloud/mcp/blankas-mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add sirsinatoriai-png-blankas -t streamable-http -u 'https://pvl.app.n8n.cloud/mcp/blankas-mcp'
```

### Other

```json
{
  "mcpServers": {
    "sirsinatoriai-png-blankas": {
      "type": "http",
      "url": "https://pvl.app.n8n.cloud/mcp/blankas-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.

### 2026-11-05 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 69, +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.

### 2026-10-24 (score 68, +1)

- [security] Tool “blankas_verify” rewrote its description, which is the text the model reads
- [cosmetic] “blankas_verify” reworded the description of “document”

### 2026-10-22 (score 67, +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.

## MCP tools (6)

### `blankas_marks` (~49 tokens)

Look up timestamped proofs (marks) of an agreement between AI agents by blank ID.

Input parameters:

- `blank_id` (string, required): Blank ID, for example BLK-000001-7afb11

### `blankas_mark` (~92 tokens)

Timestamp proof that both AI agents signed an agreement: registers only the deal hash, never the terms. Kept 72 hours.

Input parameters:

- `blank` (required): The issued blank object exactly as returned by blankas_issue
- `deal_hash` (string, required): Deal hash: 64-character lowercase hex SHA-256
- `signatures` (required): Object with Ed25519 signatures a and b over the deal hash, base64url

### `blankas_verify` (~102 tokens)

Verify a co-signed agreement between AI agents. The document parameter must be the complete JSON object {blank, content, deal_hash, signatures}, not text. Checks the issuer signature, the terms and both party signatures; use it as proof of agreement or dispute evidence. Free. To look up timestamped marks by blank ID, use blankas_marks instead.

Input parameters:

- `document` (required): The complete JSON object {blank, content, deal_hash, signatures}, not text

### `blankas_issue` (~129 tokens)

Start a verifiable agreement between two AI agents: issues a numbered, issuer-signed blank form for a deal, contract, order or service terms. Both parties then sign the same terms with their own keys, so each holds proof of agreement. Uses one free blank. Never send private keys.

Input parameters:

- `party_a` (required): Public keys of party A: object with sign (Ed25519) and box (X25519), each 32 raw bytes as base64url without padding
- `party_b` (required): Public keys of party B in the same format as party_a, different from party A

### `blankas_spec` (~46 tokens)

How to make a verifiable, co-signed agreement (contract) between two AI agents with Blankas: form fields, canonical JSON, deal hash and Ed25519 signing rules.

### `blankas_info` (~47 tokens)

Status of Blankas, a free service for verifiable agreements between AI agents: issuer public key, free blanks left, links to the spec and to the local signer. Call this first.

## Diagnostics

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

## Score history

- 2026-11-05: 74
- 2026-11-04: 73
- 2026-11-03: 73
- 2026-11-02: 72
- 2026-11-01: 72
- 2026-10-31: 71
- 2026-10-30: 71
- 2026-10-29: 70
- 2026-10-28: 70
- 2026-10-27: 69
- 2026-10-26: 69
- 2026-10-25: 69
- 2026-10-24: 68
- 2026-10-23: 67
- 2026-10-22: 67
- 2026-10-21: 66
- 2026-10-20: 66

## Common questions

### What is the Blankas MCP server?

Blankas is an MCP server listed in the public MCP registry as io.github.sirsinatoriai-png/blankas. Numbered, signed blank forms for agent-to-agent deals: issue, co-sign, verify and mark. This page covers its hosted endpoint (https://pvl.app.n8n.cloud/mcp/blankas-mcp).

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

Blankas scores 74 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 Blankas MCP server expose?

Blankas exposes 6 tools: blankas_marks, blankas_mark, blankas_verify, blankas_issue, blankas_spec, blankas_info. Their descriptions and schemas cost roughly 465 tokens of context every time the server is loaded.

### Does the Blankas MCP server require authentication?

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

### Is the Blankas MCP server still maintained?

Blankas 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.

## Links

- Remote endpoint: https://pvl.app.n8n.cloud/mcp/blankas-mcp
- Website: https://pvl.app.n8n.cloud/webhook/blankas/ui
- Changelog RSS feed: https://verifymcp.io/servers/sirsinatoriai-png-blankas/mcp-blankas-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/sirsinatoriai-png-blankas/mcp-blankas-mcp.json
- HTML version of this page: https://verifymcp.io/servers/sirsinatoriai-png-blankas/mcp-blankas-mcp