Scan MCP tool definitions for poisoning, look up server history, count tool-list tokens. Free.
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Call this server's tools from your browser. Nothing to install.
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
Tool list from our last check. Connect live to refresh it.
Look up an MCP server in HISTOR, a public append-only log of MCP tool sets: when its tool set was first pinned, how often it changed, and what the pattern scan found. HISTOR answers from its own observations and never contacts the server.
Or its registry name, e.g. io.github.owner/server
https URL of the MCP server
Look up an MCP server in HISTOR, a public append-only log of MCP tool sets: when its tool set was first pinned, how often it changed, and what the pattern scan found. HISTOR answers from its own observations and never contacts the server.
| Argument | Type | Description |
|---|---|---|
| name | string | Or its registry name, e.g. io.github.owner/server |
| endpoint | string | https URL of the MCP server |
{
"type": "object",
"properties": {
"name": {
"type": "string",
"description": "Or its registry name, e.g. io.github.owner/server"
},
"endpoint": {
"type": "string",
"description": "https URL of the MCP server"
}
}
}How many tokens an MCP server's tool list adds to every model request, what that costs per 1,000 requests, the heaviest tools, and where it sits among 18,204 packages and 16,170 remote servers. Send a tools/list or name a server HISTOR observes.
| Argument | Type | Description |
|---|---|---|
| tools | array | A tools/list result |
| server | string | Or a server HISTOR observes: https endpoint, npm:<package>, pypi:<package> or registry name |
{
"type": "object",
"properties": {
"tools": {
"type": "array",
"items": {
"type": "object"
},
"description": "A tools/list result"
},
"server": {
"type": "string",
"description": "Or a server HISTOR observes: https endpoint, npm:<package>, pypi:<package> or registry name"
}
}
}Scan an MCP server's tools/list with WARDEN, the open-source MCP firewall: static rules and a threat list over every name, description, schema and annotation. Returns allow or block and each finding with its rule and severity. Quoted fragments of the scanned text are left out of the answer.
| Argument | Type | Description |
|---|---|---|
| tools* | array | The server's tools/list result: [{name, description, inputSchema, ...}] |
| server | object | Optional {name, url} to label the verdict |
{
"type": "object",
"required": [
"tools"
],
"properties": {
"tools": {
"type": "array",
"items": {
"type": "object"
},
"description": "The server's tools/list result: [{name, description, inputSchema, ...}]"
},
"server": {
"type": "object",
"description": "Optional {name, url} to label the verdict"
}
}
}Check a signed x402 USDC payment before submitting it: recovers the EIP-712 signer, runs USDC's own checks and the seller's terms, and when the signature fails names the domain it was really made for (e.g. Base Sepolia's 'USDC' used on Base, where USDC is 'USD Coin').
| Argument | Type | Description |
|---|---|---|
| network | string | With authorization: base, base-sepolia, … or eip155:<id> |
| signature | string | With authorization: the 65-byte hex signature |
| x_payment | string | The X-PAYMENT header (base64) |
| requirements | object | The 402's accepts entry: payTo, amount, asset, network |
| authorization | object | Instead of x_payment: from, to, value, validAfter, validBefore, nonce |
{
"type": "object",
"properties": {
"network": {
"type": "string",
"description": "With authorization: base, base-sepolia, … or eip155:<id>"
},
"signature": {
"type": "string",
"description": "With authorization: the 65-byte hex signature"
},
"x_payment": {
"type": "string",
"description": "The X-PAYMENT header (base64)"
},
"requirements": {
"type": "object",
"description": "The 402's accepts entry: payTo, amount, asset, network"
},
"authorization": {
"type": "object",
"description": "Instead of x_payment: from, to, value, validAfter, validBefore, nonce"
}
}
}