# FirstKey (remote · mcp.firstkey.io)

FirstKey MCP: agent wallets, free cycles faucet, and one-command site deploys on ICP.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-29

## Components

- remote · `mcp.firstkey.io`: 66/100 (this document), [markdown](https://verifymcp.io/servers/firstkeyhq-firstkey-mcp/mcp.md), [page](https://verifymcp.io/servers/firstkeyhq-firstkey-mcp/mcp)

## Channel facts

- Endpoint: `https://mcp.firstkey.io/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 2026-09-29.

- **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 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.
  - 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**: 76/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1050 tokens (~131/item across 8 items; 8 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 17/100
  - Stability observed for 5 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**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "deploy_site" implies "deploy" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

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

FirstKey is a hosted endpoint at https://mcp.firstkey.io/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 firstkeyhq-firstkey-mcp 'https://mcp.firstkey.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "firstkeyhq-firstkey-mcp": {
      "url": "https://mcp.firstkey.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "firstkeyhq-firstkey-mcp": {
      "type": "http",
      "url": "https://mcp.firstkey.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.firstkeyhq-firstkey-mcp]
url = "https://mcp.firstkey.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "firstkeyhq-firstkey-mcp": {
      "type": "remote",
      "url": "https://mcp.firstkey.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add firstkeyhq-firstkey-mcp --url 'https://mcp.firstkey.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  firstkeyhq-firstkey-mcp:
    url: "https://mcp.firstkey.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "firstkeyhq-firstkey-mcp": {
      "Transport": "http",
      "Url": "https://mcp.firstkey.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add firstkeyhq-firstkey-mcp -t streamable-http -u 'https://mcp.firstkey.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "firstkeyhq-firstkey-mcp": {
      "type": "http",
      "url": "https://mcp.firstkey.io/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.

### 2026-09-29 (score 66, 0)

- [functional regression] Schema quality: 116 → 131
- [functional] New tool “get_swap_route”

### 2026-09-28 (score 66, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 66, +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.

### 2026-09-26 (score 65, 0)

- [functional regression] Schema quality: pass → fail
- [functional] Server version: 0.1.0 → 0.2.0
- [functional] New tool “get_swap_quote”

### 2026-09-25 (score 65, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 65)

First indexed and scored.

## MCP tools (8)

### `create_wallet` (~65 tokens)

Generate a fresh Ed25519 wallet for an AI agent: returns the ICP principal and the PKCS#8 PEM private key. The private key is returned exactly once over this call and is never stored anywhere. No signup, no on-chain registration — the keypair IS the wallet.

### `claim_faucet_grant` (~75 tokens)

Claim the one-time free 1T cycles grant from the FirstKey faucet for an agent principal. One claim per principal, ever. The grant lands on the cycles ledger and funds the agent's first canister deploy.

Input parameters:

- `agent` (string, required): The agent's ICP principal (text form) receiving the grant.

### `deploy_site` (~133 tokens)

Deploy a static website for an agent: creates a canister on the Internet Computer, installs the FirstKey static host, uploads every file, and returns the live https URL. The agent is added as a controller of its site canister. One free deploy per agent principal, funded from the FirstKey deploy pool; files must fit in one call (total under ~1.4 MB decoded) — use deploy_upload_chunk for larger files.

Input parameters:

- `agent` (string, required): The agent's ICP principal — becomes a controller of the site canister.
- `files` (array, required): Files to publish. Include at least index.html.

### `deploy_upload_chunk` (~207 tokens)

Upload one chunk of a large file to an already-deployed agent site (for files that don't fit in a single deploy_site call). Chunks are appended in order; set is_last on the final chunk to publish the file.

Input parameters:

- `agent` (string, required): The agent's ICP principal (must own the site).
- `canister` (string, required): The site canister principal returned by deploy_site.
- `chunk_base64` (string, required): Chunk bytes, base64-encoded.
- `chunk_index` (integer, required): 0-based chunk number. 0 starts a new upload for this path.
- `content_type` (string): MIME type (only used on the first chunk).
- `is_last` (boolean, required): True on the final chunk: assembles and publishes the file.
- `path` (string, required): Site path, e.g. assets/video.mp4
- `total_bytes` (string): Total file size in bytes, as a decimal string (only used on the first chunk).

### `check_cycles` (~32 tokens)

Read an ICP principal's cycles balance on the cycles ledger.

Input parameters:

- `principal` (string, required): ICP principal (text form).

### `get_fuel_link` (~69 tokens)

Get the FirstKey Fuel payment link for a principal: a human pays by card (Stripe) and cycles land in the agent's wallet — the sovereign refuel path when the free faucet grant or deploy pool is exhausted.

Input parameters:

- `principal` (string, required): The agent's ICP principal to refuel.

### `get_swap_quote` (~197 tokens)

Get a live, read-only swap quote on ICPSwap (the deepest on-chain DEX on ICP): how much receive_token you would get for pay_amount of pay_token. No tokens move — this prices the intent; execution happens in the agent's own wallet/canister. Tokens can be symbols (ICP, ckUSDC, ckUSDT, ckBTC, ckETH) or ledger principals.

Input parameters:

- `fee` (integer): Optional pool fee tier in hundredths of a bps (3000 = 0.3%). Defaults to trying 3000, then 10000, then 500.
- `pay_amount` (string, required): Amount to sell, in base units as a decimal string (e.g. "100000000" = 1 ICP).
- `pay_token` (string, required): Token to sell: symbol or ledger principal.
- `receive_token` (string, required): Token to buy: symbol or ledger principal.

### `get_swap_route` (~238 tokens)

Route a swap intent across ICPSwap: prices the direct pool and every two-hop path through ICP, ckUSDC, ckUSDT, ckBTC, and ckETH live on-chain, chains each leg's quoted output into the next leg's input, and returns the best route leg-by-leg. Read-only — no tokens move. Use this instead of get_swap_quote when a direct pool may be thin or missing.

Input parameters:

- `fee` (integer): Optional pool fee tier in hundredths of a bps (3000 = 0.3%), applied to every leg. Defaults to trying 3000, then 10000, then 500 per leg.
- `max_hops` (integer): 1 = direct path only, 2 = also try two-hop routes via intermediate tokens (default 2).
- `pay_amount` (string, required): Amount to sell, in base units as a decimal string (e.g. "100000000" = 1 ICP).
- `pay_token` (string, required): Token to sell: symbol or ledger principal.
- `receive_token` (string, required): Token to buy: symbol or ledger principal.

## Diagnostics

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

## Score history

- 2026-09-29: 66
- 2026-09-28: 66
- 2026-09-27: 66
- 2026-09-26: 65
- 2026-09-25: 65
- 2026-09-24: 65

## Common questions

### What is the FirstKey MCP server?

FirstKey is an MCP server listed in the public MCP registry as io.github.FirstKeyHQ/firstkey-mcp. FirstKey MCP: agent wallets, free cycles faucet, and one-command site deploys on ICP. This page covers its hosted endpoint (https://mcp.firstkey.io/mcp).

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

FirstKey scores 66 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 FirstKey MCP server expose?

FirstKey exposes 8 tools: create_wallet, claim_faucet_grant, deploy_site, deploy_upload_chunk, check_cycles, and 3 more. Their descriptions and schemas cost roughly 1,016 tokens of context every time the server is loaded.

### Does the FirstKey MCP server require authentication?

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

### Is the FirstKey MCP server still maintained?

FirstKey is still listed as active in the MCP registry. We last reached this channel on 29 September 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://mcp.firstkey.io/mcp
- Repository: https://github.com/FirstKeyHQ/firstkey-mcp
- Website: https://firstkey.io/
- Changelog RSS feed: https://verifymcp.io/servers/firstkeyhq-firstkey-mcp/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/firstkeyhq-firstkey-mcp/mcp.json
- HTML version of this page: https://verifymcp.io/servers/firstkeyhq-firstkey-mcp/mcp