Steellantern: MCP server, CLI and agent surfaces
Yes: Steellantern runs a public MCP server at fluxproof.steellantern.com that listed 6 tools to a client with no credentials on 4 November 2026. Examples: fluxproof_preflight, fluxproof_get_free_key, fluxproof_offer. It speaks streamable-http, protocol 2025-06-18. Open servers are readable by any agent; writes still depend on each tool.
Fact sheet
| Company | Steellantern (registry title: FluxProof) |
|---|---|
| Domain | steellantern.com |
| Category | Uncategorised (assigned by this directory from the registry description) |
| MCP server | Verified (No authentication) |
| Ora score | none: Ora returned no cached score for steellantern.com when asked on 5 November 2026 |
| Company found through | the GitHub MCP Registry |
| Last verified | 4 November 2026 |
MCP server
| Endpoint | https://fluxproof.steellantern.com/mcp |
|---|---|
| How it was found | listed in the GitHub MCP Registry |
| Transport | streamable-http |
| HTTP status | 200 |
| Protocol version | 2025-06-18 |
| Server | fluxproof 0.1.0 |
| Capabilities | tools |
| Tools | 6 |
| Resources | 0 |
| Prompts | 0 |
| Connected | 4 November 2026, 20:04 UTC |
| Handshake time | 258 ms over 1 attempt |
Tools listed
6 tools
- fluxproof_preflight
- fluxproof_get_free_key
- fluxproof_offer
- fluxproof_create_monitor
- fluxproof_check_now
- fluxproof_list_changes
Connector log
2 connections on 4 November 2026, read-only methods only
- 19:59:42Z https://fluxproof.steellantern.com/mcp sent initialize, notifications/initialized, tools/list result verified (HTTP 200) 840 ms
- 20:04:40Z https://fluxproof.steellantern.com/mcp sent initialize, notifications/initialized, tools/list result verified (HTTP 200) 258 ms
Authentication
| Auth type | No authentication |
|---|
The sign-in route, step by step
- Send the handshake to
https://fluxproof.steellantern.com/mcpover streamable-http. Servers on the 2026-07-28 revision answerserver/discover; older servers answerinitialize. - Send
tools/list, thenresources/listandprompts/listif the capabilities name them. - Send no token. The connector sent none and the server answered, so any MCP client can read this list.
- Calling a tool is a separate step this directory never takes.
See OAuth for MCP: client ID metadata documents and dynamic registration for how each route works.
CLI
No CLI is on record for Steellantern. The directory checks a package only where a source names one, so this is a floor: a company can ship a command line that no source read for this edition mentions. See shipping a CLI agents can use.
Other agent surfaces
| Surface | Result |
|---|---|
| OpenAPI file | No OpenAPI file at the root paths checked. |
| WebMCP in the initial HTML | Not checked: the home page was not read by the shared crawl. |
| MCP discovery file | Not checked: the domain is not in the shared crawl for this edition. |
| A2A agent card | Not checked: the domain is not in the shared crawl for this edition. |
| A2A agent card (older path) | Not checked: the domain is not in the shared crawl for this edition. |
| agents.json | Not checked: the domain is not in the shared crawl for this edition. |
| OAuth authorization server metadata | Not checked: the domain is not in the shared crawl for this edition. |
| NLWeb endpoint | Not checked in this edition. |
Registry listings
| Registry | Listed |
|---|---|
| Official MCP Registry | No |
| GitHub MCP Registry | Yes |
| awesome-remote-mcp-servers | No |
| Smithery | Not checked: Smithery's listing pages and search API were unavailable on 4 November 2026. |
| Glama | Not checked: Glama's API needs a key and attribution terms. |