Touchstone is a remote MCP server that gives an AI agent 4 tools, among them convert, get_index, get_quote. It answers at https://mcp.touchstoneassay.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 23 October 2026, succeeded.
Dated SIU, the benchmark price of AI inference work: one free tool, three paid via x402.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
convert | Convert a model call's token counts into SIU and USD. Inputs: model, input_tokens, output_tokens |
get_index | The signed Dated SIU print. Free — citation is the business. Inputs: version, date |
get_quote | SIU price, exchange rate and index refs for one task class and model. Inputs: task_class, model |
verify_receipt | Reads an on-chain settlement and returns a signed attestation. Inputs: chain, tx_hash, quote |
Every block below points at https://mcp.touchstoneassay.com/mcp. Pick your client and copy.
claude mcp add --transport http touchstone https://mcp.touchstoneassay.com/mcp
{
"mcpServers": {
"touchstone": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.touchstoneassay.com/mcp"]
}
}
}{
"mcpServers": {
"touchstone": {
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"servers": {
"touchstone": {
"type": "http",
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"context_servers": {
"touchstone": {
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"mcpServers": {
"touchstone": {
"serverUrl": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"mcpServers": {
"touchstone": {
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}name: Touchstone
version: 0.0.1
schema: v1
mcpServers:
- name: Touchstone
type: streamable-http
url: https://mcp.touchstoneassay.com/mcp{
"mcpServers": {
"touchstone": {
"httpUrl": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"mcpServers": {
"touchstone": {
"type": "http",
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}{
"mcpServers": {
"touchstone": {
"url": "https://mcp.touchstoneassay.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.touchstoneassay.com%2Fmcp&type=streamable_http&id=touchstone&name=Touchstone
It answered our last check on 23 October 2026 in 1097 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
4, as returned by the server's own tools/list on 17 September 2026: convert, get_index, get_quote, verify_receipt.
It answered our last check on 23 October 2026 in 1097 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.touchstoneassay.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.petrkrulis2022. Endpoint host: mcp.touchstoneassay.com. ARD identifier: urn:air:io.github.petrkrulis2022:mcp:touchstone-mcp.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.