Calculator is an MCP server with 10 tools an agent can call, among them calculate, calculate_cas, calculate_cas_headless. It answers at https://mcpcalc.com/api/v1/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 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.
Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
calculate | Run a calculation and get results + prefilled URL Inputs: calculator, inputs, strict |
calculate_cas | Evaluate one or more headless CAS expressions server-side (MCP-only numeric mode). Unsupported expressions return a GUI handoff link. Inputs: expression, expressions, strict |
calculate_cas_headless | Alias of calculate_cas. Headless MCP-only CAS evaluator; if unsupported features are requested, returns GUI handoff details. Inputs: expression, expressions, strict |
close_session | Close a session and optionally persist a snapshot of its final state Inputs: session_id |
create_session | Create a new interactive session for any calculator and return the session URL Inputs: calculator, metadata |
generate_prefilled_url | Generate a prefilled URL without running calculation Inputs: calculator, inputs, strict |
get_calculator_schema | Get the input schema for a specific calculator Inputs: calculator |
get_session_state | Retrieve the current field values, computation transcript, and pending message queue for an active session Inputs: session_id |
list_calculators | List available calculators, optionally filtered by category Inputs: category |
push_session_action | Push actions into a session's message queue (set fields, submit computation, trigger plot, etc.) Inputs: session_id, actions |
Every block below points at https://mcpcalc.com/api/v1/mcp. Pick your client and copy.
claude mcp add --transport http calculator https://mcpcalc.com/api/v1/mcp
{
"mcpServers": {
"calculator": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcpcalc.com/api/v1/mcp"]
}
}
}{
"mcpServers": {
"calculator": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"servers": {
"calculator": {
"type": "http",
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"context_servers": {
"calculator": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"mcpServers": {
"calculator": {
"serverUrl": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"mcpServers": {
"calculator": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}name: Calculator
version: 0.0.1
schema: v1
mcpServers:
- name: Calculator
type: streamable-http
url: https://mcpcalc.com/api/v1/mcp{
"mcpServers": {
"calculator": {
"httpUrl": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"mcpServers": {
"calculator": {
"type": "http",
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}{
"mcpServers": {
"calculator": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcpcalc.com%2Fapi%2Fv1%2Fmcp&type=streamable_http&id=calculator&name=Calculator
It answered our last check on 18 October 2026 in 1060 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by mcpcalc.com and served from mcpcalc.com, the vendor's own domain: https://mcpcalc.com/api/v1/mcp.
10, as returned by the server's own tools/list on 31 August 2026: calculate, calculate_cas, calculate_cas_headless, close_session, create_session, generate_prefilled_url, get_calculator_schema, get_session_state, and 2 more.
It answered our last check on 18 October 2026 in 1060 ms. Over 10 checks since 5 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcpcalc.com/api/v1/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: com.mcpcalc. Endpoint host: mcpcalc.com. ARD identifier: urn:air:com.mcpcalc:mcp:calculator.
First indexed 31 August 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.