presign-guard
by x402fizzlco.huggingface.x402fizzl/presign-guard
Safety checks before an AI agent pays, signs or buys (MCP)
- Remote endpoint
- 3 tools
- MIT
Uptime
Checked · every day
100%from 4 days of checks
Up without downtime on 4 of 4 days with data.
- No downtime
- Degraded
- Down over 5 minutes
- No data
- Not checked yet
Response time
Median 1356 ms, slowest 5% 1979 ms for the handshake and the tool list, over 30 days.
How far each check got
- Reached the address 100%
- Completed the handshake 100%
- Listed its tools 100%
3 tools at the last answer.
Every day
| Day | Result | Checks | Median |
|---|---|---|---|
| 3 Nov (today) | No downtime | 1 | 1979 ms |
| 2 Nov | No downtime | 1of 1 | 1695 ms |
| 1 Nov | No downtime | 1of 1 | 1280 ms |
| 31 Oct | No downtime | 2 | 1249 ms |
A failure counts as down time only when a second check five minutes later fails too. How we check
Connect to the publisher's own endpoint
Paste into Settings › Connectors › Add custom connector:
https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse Run in a terminal:
claude mcp add --transport sse presign-guard https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse Add to ~/.cursor/mcp.json:
Add to ~/.config/devin/mcp_config.json:
Add to mcp.json (Program › Install › Edit mcp.json):
Add to ~/.gemini/settings.json:
Add to config.json in oterm's data folder (~/Library/Application Support/oterm on macOS, ~/.local/share/oterm on Linux, %APPDATA%\oterm on Windows):
Add to ~/.config/eca/config.json (global) or .eca/config.json in the project:
{
"mcpServers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} Add to .vscode/mcp.json:
{
"servers": {
"presign-guard": {
"type": "sse",
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} Add to ~/.config/zed/settings.json:
{
"context_servers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
Add to cline_mcp_settings.json (MCP Servers › Configure › Configure MCP Servers):
Add to anythingllm_mcp_servers.json in the AnythingLLM storage plugins directory:
Add to Augment Settings Panel – MCP section – Import from JSON (VS Code extension):
{
"mcpServers": {
"presign-guard": {
"type": "sse",
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} Add to ~/.continue/config.yaml:
mcpServers:
- name: "presign-guard"
type: sse
url: "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse" Add to ~/.config/goose/config.yaml:
extensions:
"presign-guard":
type: streamable_http
name: "presign-guard"
enabled: true
uri: "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
headers: {}
env_keys: []
envs: {}
timeout: 300 This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
Run in a terminal:
codex mcp add presign-guard --url https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
Add to ~/.llm/config.json:
Add to resources/assets/config/mcp.json in the installed app:
Add to ~/.boltai/mcp.json:
Add to ~/.bob/settings/mcp.json (global) or .bob/mcp.json (project):
Add to ~/.kiro/settings/mcp.json (user) or .kiro/settings/mcp.json (workspace):
Add to ~/.kiro/settings/mcp.json (user) or .kiro/settings/mcp.json (workspace):
{
"mcpServers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
Add to ~/.config/agenvoy/mcp.json:
{
"servers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
Add to ~/.config/amp/settings.json (user) or .amp/settings.json (workspace):
{
"amp.mcpServers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
} For agents: the install prompt
Every step above as one Markdown text, for an assistant installing it for you.
# Install the MCP server presign-guard (`co.huggingface.x402fizzl/presign-guard`)
Its page: https://plug.directory/servers/co.huggingface.x402fizzl/presign-guard
It runs on the publisher's servers; the client connects to its URL.
Use the section for the person's client.
## Claude Desktop
Paste into Settings › Connectors › Add custom connector:
```text
https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse
```
## Claude Code
Run in a terminal:
```sh
claude mcp add --transport sse presign-guard https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse
```
## Cursor, Devin Desktop, LM Studio, Gemini CLI, oterm, ECA
Merge into the place for the person's client:
- Cursor: ~/.cursor/mcp.json
- Devin Desktop: ~/.config/devin/mcp_config.json
- LM Studio: mcp.json (Program › Install › Edit mcp.json)
- Gemini CLI: ~/.gemini/settings.json
- oterm: config.json in oterm's data folder (~/Library/Application Support/oterm on macOS, ~/.local/share/oterm on Linux, %APPDATA%\oterm on Windows)
- ECA: ~/.config/eca/config.json (global) or .eca/config.json in the project
```json
{
"mcpServers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
}
```
## VS Code
Merge into .vscode/mcp.json:
```json
{
"servers": {
"presign-guard": {
"type": "sse",
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
}
```
## Zed
This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
## Cline, AnythingLLM, Augment Code
Merge into the place for the person's client:
- Cline: cline_mcp_settings.json (MCP Servers › Configure › Configure MCP Servers)
- AnythingLLM: anythingllm_mcp_servers.json in the AnythingLLM storage plugins directory
- Augment Code: Augment Settings Panel – MCP section – Import from JSON (VS Code extension)
```json
{
"mcpServers": {
"presign-guard": {
"type": "sse",
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
}
```
## Continue
Merge into ~/.continue/config.yaml:
```yaml
mcpServers:
- name: "presign-guard"
type: sse
url: "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
```
## Goose
This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
## Codex
This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
## mcp-client-cli, TUUI, BoltAI, Bob Shell, Kiro, Kiro CLI
This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
## Agenvoy
This server's endpoint speaks only SSE, which this client's documentation does not list among its transports; use another client for it.
## Amp
Merge into ~/.config/amp/settings.json (user) or .amp/settings.json (workspace):
```json
{
"amp.mcpServers": {
"presign-guard": {
"url": "https://x402fizzl-presign-guard.hf.space/gradio_api/mcp/sse"
}
}
}
```
Then restart the client, or reload its MCP servers, and ask it to list the server's tools to confirm it started.
Tools 3
presign_guard_presign_quick_checkA quick green / orange / red verdict for what your agent is about to sign, before it signs. Covers EVM transactions, token approvals, EIP-712 signatures (Permit, Permit2, orders), EIP-7702 authorizations, plain messages, Solana transactions, XRP Ledger transactions (including Batch, delegation and MPTs) and Algorand transactions. This free version returns the verdict only; the reason codes are in presign-guard's paid check ($0.01 over x402, POST https://presign-guard.fizzl.eu/v1/check), which also signs a receipt.presign_guard_screen_addressIs this address on the OFAC SDN list? Screen a counterparty before your agent pays it, signs for it or accepts its funds. Matches the address against every digital currency address on the US Treasury's OFAC SDN list (Bitcoin, Ethereum and EVM chains, Tron, Solana with its USDC and USDT token accounts, and more), from presign-guard's open copy of the list, which it refreshes from the Treasury every 6 hours. A match names the listed entity and its sanctions programs. Free and unlimited.presign_guard_token_quick_verdictA quick green / orange / red verdict and a grade (SAFE, CAUTION, RISKY, AVOID) for a token your agent is about to buy, hold or accept. presign-guard checks mint and freeze authority, honeypots, taxes and transfer fees, liquidity, the token's age, concentrated holders and rug pulls. This free version returns the verdict and grade only; the reasons, a one-line summary and market data are in presign-guard's paid GET /v1/token ($0.01 over x402).
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