io.github.marianfoo/arc-1
ARC-1
Is the ARC-1 MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
MCP server for SAP ABAP systems
alive probed 2026-11-15 · unchanged since 2026-10-30
8tools
17ktokens in Claude Opus 5.5
8.4 %of Claude's 200k window
6.7×the median server
1.3 sto initialize
68 msto list tools
- Run it
- npx -y arc-1@0.9.18 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- arc-1 0.9.18
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 1.7 % of a 1M context window
- Count
- 17k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 17k. The o200k_base estimate is 9.8k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/marianfoo/arc-1.git
- Website
- https://marianfoo.github.io/arc-1/
- Registry
- active, updated 2026-06-16 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.71×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| SAPRead | 4 899 | 2 864 | 29 % |
| SAPDiagnose | 2 569 | 1 502 | 15 % |
| SAPTransport | 2 410 | 1 409 | 14 % |
| SAPContext | 2 147 | 1 255 | 13 % |
| SAPManage | 2 063 | 1 206 | 12 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.marcelo-ochoa/qnap · alive
- io.github.marcimastro98/xenon-widgets · alive
- io.github.marcoguillermaz/tierward · crashed on start
- Substack MCP Server io.github.marcomoauro/substack-mcp · alive
- io.github.marianfoo/mcp-sap-docs · not found
- io.github.marin1321/mcp-devtools · alive
- io.github.mario-andreschak/mcp-abap-abap-adt-api · alive
- io.github.mario-andreschak/mcp-abap-adt · alive
Servers that mention systems or abap.
- Aevia ai.aeviamodeler/aevia · needs auth
- Emisso Connect ai.emisso/connect · needs auth
- ai.kaiv/dependency-trust · alive
- Raven ai.ravenmcp/raven-mcp · alive
- RoboSystems ai.robosystems/robosystems · needs auth
- HVAC Builder app.hvacbuilder/hvac-builder · needs auth
- ARADIA | sovereign & private agentic systems com.aradia/sovereign-hardware · timeout
- Booking Request com.bonissystems/booking-request · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.