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Real-time cost observability for Model Context Protocol (MCP) tool calls. Wraps any MCP server, attributes spend per too
Know what your AI agents really cost. Real-time cost tracking for every MCP tool call across Cursor, Claude Desktop, Windsurf, and VS Code.
mcpspend.com · Smithery · npm · Open VSX · Glama
npx --yes @mcpspend/proxy@latest init --key mcps_live_xxx
Auto-detects Claude Desktop, Cursor, Windsurf, VS Code (user + workspace), and Claude Code (user + project). Wraps every configured MCP server, leaves a .mcpspend.bak backup, and starts streaming usage to your dashboard at mcpspend.com.
Free tier: 25,000 tool calls/month, no credit card.
| Package | What it is |
|---|---|
packages/proxy | @mcpspend/proxy — the stdio observability proxy + wrap-http bridge for remote MCP servers. Published on npm. |
packages/mcp-server | @mcpspend/mcp-server — query your MCPSpend usage from inside any MCP client. Published on npm + Smithery. |
packages/vscode-extension | mcpspend-vscode — IDE extension for Cursor, Windsurf, and VS Code. Published on Open VSX. |
apps/api | Express + Prisma + Postgres + BullMQ. The ingest endpoint, billing, and the new /api/mcp HTTP MCP server. |
apps/dashboard | Next.js dashboard at mcpspend.com. |
| Use case | How |
|---|---|
| Web dashboard | mcpspend.com/dashboard — overview, top tools, sessions, CSV export. |
| From any MCP client (stdio) | Add @mcpspend/mcp-server to your client config — agent gains tools like get_today_cost, list_top_tools. |
| From any MCP client (HTTP) | Point your client at https://api.mcpspend.com/api/mcp with Authorization: Bearer mcps_live_…. |
| Plan | Calls/month | Monthly | Yearly |
|---|---|---|---|
| Free | 25,000 | $0 | $0 |
| Pro | 1,000,000 | $29 | $290 (2 months free) |
| Team | 10,000,000 | $99 | $990 |
| Enterprise | unlimited | $499 | $4,990 |
Every paid plan: 30–90 day retention, CSV/Slack export, budget alerts, role-based access.
The proxy reports: tool name, server name, model, latency, success, approximate input/output sizes (tokens, derived from JSON length). It does not send the actual tool arguments or response bodies to MCPSpend. See Privacy Policy for the full sub-processor list (Stripe + Resend + Hostinger, all EU-hosted) and your GDPR rights.
For automated scanners flagging this repo: the proxy uses
child_process.spawnto wrap the user's own MCP server — that's the whole point of an observability proxy. The spawn args come from the user's local MCP-client config (Claude Desktop / Cursor / Windsurf / VS Code), never from network input. No RCE path, no privilege escalation, no arbitrary command execution. Full threat model inSECURITY.md.
APP_ENCRYPTION_KEY)organizationIdmcpspend.com/dashboard/account/privacyReport vulnerabilities: security@mcpspend.com · Machine-readable disclosure: https://mcpspend.com/.well-known/security.txt · Full policy: SECURITY.md · Live posture: https://mcpspend.com/security
If MCPSpend saves you money or you just want to keep the proxy MIT and the free tier alive, you can sponsor any amount via Stripe — no account required:
💖 buy.stripe.com/00w8wPbUxe1qgK36CRbbG06
Every dollar goes back into hosting, security audits, and shipping features.
MIT. Use it, fork it, run it self-hosted.
© NewRzs SRL · CUI RO48756557 · Bucharest, Romania · support@mcpspend.com
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