MCP MeasureMCP Measure

index observed

freeport-nostr

Search Freeport Nostr events by kind, tag & geohash radius (rides, services, reputation).

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
88%
Naming quality
80%
Poisoning risk
80%
Permission match
100%
Protocol compliance
100%

Findings (2)

  • HIGHTool poisoning patterns detected
  • MEDIUMTool description contains suspicious base64-like encoded stringin nostr_query_raw

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~1,784Tokens (tool definitions)
~2.6 KBTypical response size
Moderate attention impact (1.39% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "freeport-nostr": {
      "command": "npx",
      "args": [
        "freeport-nostr-mcp"
      ]
    }
  }
}

Runnable packages

npmfreeport-nostr-mcp0.5.0stdio

Remote endpoints

https://nostr-mcp.trinh.uk/mcpstreamable-http

What it can do

Tool inventory

Tools (6)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢nostr_search_intents(side, topics, near, relaySideGeohash, since, ...)

Search Freeport ride/service/product intents (offers & requests). Filter by side, category/area topic tags, and an optional geographic radius. Results are decoded, expiry-filtered, and sorted nearest-first when a point is given.

Input Schema

{
  "type": "object",
  "properties": {
    "side": {
      "type": "string",
      "enum": [
        "offer",
        "request",
        "any"
      ],
      "default": "any",
      "description": "offer = drivers/providers/sellers; request = riders/buyers; any = both"
    },
    "topics": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Topic `t` tags to require (category/subcategory/area keys, e.g. \"vn_hanoi\", \"ridesharing\")."
    },
    "near": {
      "type": "object",
      "properties": {
        "lat": {
          "type": "number"
        },
        "lon": {
          "type": "number"
        },
        "radiusKm": {
          "type": "number",
          "exclusiveMinimum": 0,
          "maximum": 20000,
          "default": 100
        }
      },
      "required": [
        "lat",
        "lon"
      ],
      "additionalProperties": false,
      "description": "Filter & sort by distance from this point."
    },
    "relaySideGeohash": {
      "type": "boolean",
      "default": false,
      "description": "Also narrow at the relay via a #g cover of the radius. Only effective if posts carry geohash-prefix tags; off by default."
    },
    "since": {
      "type": "integer",
      "description": "Only events created at/after this unix-seconds time."
    },
    "until": {
      "type": "integer",
      "description": "Only events created at/before this unix-seconds time."
    },
    "includeExpired": {
      "type": "boolean",
      "default": false
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 500,
      "default": 200
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10,
      "description": "Override the relay set for this call (ws/wss URLs, max 10). Defaults to the server relays."
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢nostr_search_reputation(pubkey, limit, relays)

Fetch reputation signals for a pubkey: karma ratings (kind 32103) it received and deal receipts (kind 32104). Returns proven-deal count (both receipt halves present) and a karma summary. Note: scores are subjective and un-weighted here; do not treat as Sybil-proof.

Input Schema

{
  "type": "object",
  "properties": {
    "pubkey": {
      "type": "string",
      "description": "Subject pubkey (hex) to look up reputation for."
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 1000,
      "default": 500
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10,
      "description": "Override the relay set for this call (ws/wss URLs, max 10). Defaults to the server relays."
    }
  },
  "required": [
    "pubkey"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢nostr_get_event(ids, relays)

Fetch one or more events by id. Returns the raw signed events.

Input Schema

{
  "type": "object",
  "properties": {
    "ids": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 50
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10,
      "description": "Override the relay set for this call (ws/wss URLs, max 10). Defaults to the server relays."
    }
  },
  "required": [
    "ids"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢nostr_profile(pubkeys, recentNotes, relays)

Fetch NIP-01 profile metadata (kind 0) for one or more pubkeys — name, about, picture, nip05, lud16, etc. Optionally include each author's most recent notes (kind 1). General-purpose: works for any Nostr user, not just Freeport.

Input Schema

{
  "type": "object",
  "properties": {
    "pubkeys": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 20,
      "description": "Hex pubkeys to fetch profiles for."
    },
    "recentNotes": {
      "type": "integer",
      "minimum": 0,
      "maximum": 20,
      "default": 0,
      "description": "If >0, also fetch up to this many recent text notes (kind 1) per pubkey."
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10,
      "description": "Override the relay set for this call (ws/wss URLs, max 10). Defaults to the server relays."
    }
  },
  "required": [
    "pubkeys"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢nostr_query_raw(kinds, authors, ids, tags, since, ...)

Escape hatch: run an arbitrary NIP-01 filter (kinds/authors/ids/tags/since/until/limit). Use the typed tools above when they fit. Returns raw signed events.

Input Schema

{
  "type": "object",
  "properties": {
    "kinds": {
      "type": "array",
      "items": {
        "type": "integer"
      }
    },
    "authors": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "ids": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "tags": {
      "type": "object",
      "additionalProperties": {
        "type": "array",
        "items": {
          "type": "string"
        }
      },
      "description": "Tag filters, e.g. {\"t\":[\"vn_hanoi\"],\"g\":[\"w3gv\"]}. Keys are single tag letters."
    },
    "since": {
      "type": "integer"
    },
    "until": {
      "type": "integer"
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 500,
      "default": 100
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10,
      "description": "Override the relay set for this call (ws/wss URLs, max 10). Defaults to the server relays."
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟡freeport_create_post(secretKey, side, market, schema, title, ...)

Publish a Freeport intent — an OFFER (side "offer": driver/provider/seller) or a REQUEST (side "request": rider/buyer). Provide EITHER a `secretKey` (nsec or hex — the server builds, signs and publishes; use a DEDICATED agent key, never a personal one — it is used once and never stored) OR a pre-signed `event` (you sign locally; nothing secret reaches the server). Strict rate limits apply. Returns the published event id + addressable `d`.

Input Schema

{
  "type": "object",
  "properties": {
    "secretKey": {
      "type": "string",
      "description": "nsec or 64-hex private key. Used transiently to sign; never stored. Omit if passing a pre-signed `event`."
    },
    "side": {
      "type": "string",
      "enum": [
        "offer",
        "request"
      ],
      "description": "offer = provider/seller/driver; request = buyer/rider."
    },
    "market": {
      "type": "string",
      "description": "Market key, e.g. \"rideshare\" or \"service\"."
    },
    "schema": {
      "type": "string",
      "description": "Payload schema, e.g. \"rideshare/1\" or \"service/1\"."
    },
    "title": {
      "type": "string",
      "maxLength": 200
    },
    "payload": {
      "type": "object",
      "additionalProperties": {},
      "description": "Intent payload (from/to/location, payment, etc.) per the freeport://protocol resource."
    },
    "expiresInMinutes": {
      "type": "integer",
      "minimum": 5,
      "maximum": 43200,
      "description": "How long the post stays live (default 720). Max 30 days."
    },
    "window": {
      "type": "object",
      "properties": {
        "start": {
          "type": "integer"
        },
        "end": {
          "type": "integer"
        }
      },
      "required": [
        "start",
        "end"
      ],
      "additionalProperties": false
    },
    "geohashes": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 8,
      "description": "Geohashes for location-scoped discovery. Each is expanded into all its prefixes (precision 1-6) so radius searches at any precision match."
    },
    "topics": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 8,
      "description": "Topic `t` tags (area/category), e.g. [\"vn_hanoi\",\"vn_hanoi_ridesharing\"]."
    },
    "d": {
      "type": "string",
      "description": "Stable id to republish/replace an existing post; defaults to random."
    },
    "event": {
      "description": "A complete, signed Nostr event (kind 32101/32102). Use instead of secretKey to keep keys off the server."
    },
    "relays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Community

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Evidence

Recent observations

verifiedversion not recorded6 tools
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