Exact Calc vs Ruv Swarm
A side-by-side look at the Exact Calc and Ruv Swarm MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
E
Exact CalcDeveloper Tools · Local subprocess (stdio)Exact arithmetic for AI agents. Two independent engines cross-check every result.41FairAuth: not declaredVerdict: choose Exact Calc for developer tools work as a local process; choose Ruv Swarm for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
EChoose Exact Calc when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
Choose Ruv Swarm when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | E Exact Calc | |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 41/100 · Fair | 51/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | No auth required |
| Pricing | Not declared | Free |
| Required env vars | None listed | None listed |
| Verified owner | Community listing |
Tools & capabilities
Exact Calc tools
No tool names declared yet. Check the project README from the listing page.
Ruv Swarm tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Exact Calc
{
"mcpServers": {
"exact-calc": {
"command": "uvx",
"args": [
"--from",
"exact-calc-mcp",
"exact-calc"
]
}
}
}
Ruv Swarm
{
"mcpServers": {
"ruv-swarm": {
"command": "npx",
"args": [
"-y",
"ruv-swarm@latest"
]
}
}
}
Frequently asked questions
Exact Calc is categorized under Developer Tools and uses a local stdio subprocess. Ruv Swarm belongs to Developer Tools and uses a local stdio subprocess. Pick Exact Calc for developer tools work and Ruv Swarm for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Exact Calc has no declared pricing — check the project's own site. Ruv Swarm is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add exact-calc and ruv-swarm as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Exact Calc has a quality signal of 41/100 (Fair) with 0 views, 0 installs and 2 GitHub stars. Ruv Swarm has 51/100 (Good) with 3 views, 0 installs and 385 GitHub stars.
