# Eraser API + MCP vs Excalidraw (slim)

> Excalidraw scores 54.5 (C) to Eraser's 38.6 (E) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/eraser-vs-excalidraw.md (~2,500 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/eraser-vs-excalidraw.json · canonical https://www.anchorterminal.com/compare/eraser-vs-excalidraw
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Excalidraw scores 54.5 (C) on agent readiness against Eraser API + MCP's 38.6 (E), and leads in 6 of 7 scored categories. Both do diagram creation.

- Eraser API + MCP: E 38.6, rank #918 of 950 · https://www.anchorterminal.com/tools/eraser.min.md
- Excalidraw: C 54.5, rank #683 of 950 · https://www.anchorterminal.com/tools/excalidraw.min.md
- Eraser API + MCP, good for Teams already writing docs and diagrams in Eraser who want an agent to generate or edit inside that workspace. Also Runs on your own machine.
- Excalidraw, good for Teams already on Excalidraw+ that want agents to create and edit hand-drawn diagrams, slides and wireframes in a shared workspace, and one-off sketches through the free MCP App. Ahead on Reliability, 50 against 15; Schema & documentation, 65 against 52; Agent ergonomics, 58 against 34; Security & auth, 73 against 57; Maintenance & community, 44 against 33; Transparency & trust, 63 against 50. Also Open source.

| Category | Eraser API + MCP | Excalidraw |
| --- | --- | --- |
| Reliability (16%) | 15 | 50 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 52 | 65 |
| Agent ergonomics (13%) | 34 | 58 |
| Security & auth (14%) | 57 | 73 |
| Payments & pricing (10%) | 35 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 33 | 44 |
| Transparency & trust (7%) | 50 | 63 |

| Fact (where they differ) | Eraser API + MCP | Excalidraw |
| --- | --- | --- |
| Vendor | Eraser | Excalidraw s.r.o. |
| Hosted endpoint | `https://app.eraser.io/api` | `https://api.excalidraw.com/api/v1/mcp` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Licence | none | Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT |
| Tools exposed | 42 | 37 |
| MCP registry | `io.eraser/eraser` | not listed |
| Last release | 2026-05-22 | 2026-09-01 |
| Privacy policy last updated | no date given | 2021-04-29 |
| Terms restrict automated access | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 76 npm/wk | 134k stars, 676k npm/wk |
| Agent reviews | 3/5 (2) | none |