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Promptster

R2· OAuth, once

Test and compare prompts across any AI provider. Bring your own keys.

v1.0.0 · active · repository · website · descriptor JSON · versions

An agent can connect after a one-time OAuth consent by a human.Remote endpoint behind OAuth 2. Tokens stay with the agent; the registry only exposes the authorization metadata.
Quality83good
Trust82of 100
Uptime, 30 days100%
Latency p50346 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "promptster": {
      "type": "http",
      "url": "https://www.promptster.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${PROMPTSTER_TOKEN}"
      }
    }
  }
}
claude mcp add --transport http promptster https://www.promptster.dev/mcp --header "Authorization: Bearer ${PROMPTSTER_TOKEN}"
[mcp_servers.promptster]
url = "https://www.promptster.dev/mcp"
bearer_token_env_var = "PROMPTSTER_TOKEN"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "promptster": {
      "type": "remote",
      "url": "https://www.promptster.dev/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:PROMPTSTER_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "promptster": {
      "type": "http",
      "url": "https://www.promptster.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${PROMPTSTER_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=promptster&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vd3d3LnByb21wdHN0ZXIuZGV2L21jcCIsImhlYWRlcnMiOnsiQXV0aG9yaXphdGlvbiI6IkJlYXJlciAke1BST01QVFNURVJfVE9LRU59In19"
}
{
  "servers": {
    "promptster": {
      "type": "http",
      "url": "https://www.promptster.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${PROMPTSTER_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "promptster": {
      "httpUrl": "https://www.promptster.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${PROMPTSTER_TOKEN}"
      }
    }
  }
}
extensions:
  "promptster":
    enabled: true
    name: "promptster"
    type: streamable_http
    uri: "https://www.promptster.dev/mcp"
    headers:
      "Authorization": "Bearer ${PROMPTSTER_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${PROMPTSTER_TOKEN}. The registry never accepts secret values.

Quality 83 / 100good

protocoln/a · weight 25
  • n/a
    protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)
authorization83 · weight 15
  • pass
    auth.prmProtected Resource Metadata (RFC 9728) published
  • pass
    auth.as_metadataauthorization server metadata reachable
  • warn
    auth.cimdonly Dynamic Client Registration, deprecated in 2026-07-28 in favour of CIMD
  • n/a
    auth.secret_in_urlno templated URL
tool hygienen/a · weight 30
  • n/a
    tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool list unknown
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

Tool list unknown · checked 2026-10-20 09:31 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 82 / 100

provenance75
liveness100
freshness45
hygiene100

+repository +website +reachable +uptime-100% -stale-214d

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://www.promptster.dev/mcp streamable-httpoauth2 AS: https://www.promptster.devyes100%346 ms–2026-10-20

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "io.github.promptster-dev/promptster",
  "icons": [
    {
      "src": "https://www.promptster.dev/icon-192.png",
      "sizes": [
        "192x192"
      ],
      "mimeType": "image/png"
    },
    {
      "src": "https://www.promptster.dev/icon-512.png",
      "sizes": [
        "512x512"
      ],
      "mimeType": "image/png"
    }
  ],
  "title": "Promptster",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://www.promptster.dev/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "isRequired": true,
          "description": "Promptster API key (pk_live_...) from promptster.dev/developer/api-keys"
        }
      ]
    }
  ],
  "version": "1.0.0",
  "repository": {
    "url": "https://github.com/promptsterhq/promptster",
    "source": "github"
  },
  "websiteUrl": "https://www.promptster.dev",
  "description": "Test and compare prompts across any AI provider. Bring your own keys."
}