_ registry / mcp streamable-http · checked 12h ago

xmark

https://api.xmark.dev

Registry code: 066b8810ee99a929

api record

Search and chat with your X bookmarks, with citations back to the original posts.

from a public catalogue that lists it, not from the operator

endpoint
https://api.xmark.dev/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is xmark live?
Yes — it answered the hub's last check (checked 12h ago). It answered 100% of checks over the last 30 days.
Is xmark free to use?
Not anonymously — it asks for a key or a login before it will serve. Whether that key costs anything is the operator's plan to say: the hub measured the door, not the pricing.
What tools does xmark have?
11 tools: list_bookmarks, get_bookmark, delete_conversation, search_bookmarks, sync_bookmarks, delete_bookmark, chat, list_conversations, ….
Is xmark safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
324ms

last good check

priced tools
0

of 11 tools

_ answered our checks, 90 days 1 checks · signed record
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 11 tools
11 auth-required 11 of 11 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • list_bookmarks auth-required never probed

    List the authenticated user's X bookmarks. Paginated.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "page": {
      "type": "integer",
      "default": 1,
      "minimum": 1,
      "description": "Page number (1-indexed)"
    },
    "pageSize": {
      "type": "integer",
      "default": 50,
      "maximum": 100,
      "minimum": 1,
      "description": "Items per page (max 100)"
    }
  },
  "additionalProperties": false
}
    arguments 20 lines
  • get_bookmark auth-required never probed

    Fetch a single bookmark by ID.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "format": "uuid",
      "description": "Bookmark UUID"
    }
  },
  "additionalProperties": false
}
    arguments 15 lines
  • delete_conversation auth-required never probed

    Permanently delete a conversation and its messages. Free tier allows one concurrent conversation, so deleting is how a free account starts a fresh chat.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "conversationId"
  ],
  "properties": {
    "conversationId": {
      "type": "string",
      "format": "uuid",
      "description": "Conversation UUID"
    }
  },
  "additionalProperties": false
}
    arguments 15 lines
  • search_bookmarks auth-required never probed

    Semantic search over the user's bookmarks. Returns ranked matches with relevance scores.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 50,
      "minimum": 1,
      "description": "Max results to return"
    },
    "query": {
      "type": "string",
      "minLength": 1,
      "description": "Natural-language search query"
    }
  },
  "additionalProperties": false
}
    arguments 22 lines
  • sync_bookmarks auth-required never probed

    Trigger a fresh sync from X. Pulls latest bookmarks, embeds new ones for semantic search. Free tier allows one sync per day.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
    arguments 5 lines
  • delete_bookmark auth-required never probed

    Remove a bookmark. Local-only by default — the next sync re-creates anything still bookmarked on X. Set unbookmark=true to also remove it on X (sticks across syncs; requires a connected X account).

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "format": "uuid",
      "description": "Bookmark UUID"
    },
    "unbookmark": {
      "type": "boolean",
      "default": false,
      "description": "Also remove the bookmark on X, not just locally"
    }
  },
  "additionalProperties": false
}
    arguments 20 lines
  • chat auth-required never probed

    Ask a natural-language question about the user's X bookmarks. Returns an answer with citations back to the original tweets. Free tier includes 20 chat messages per month.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "question"
  ],
  "properties": {
    "question": {
      "type": "string",
      "minLength": 1,
      "description": "The question to ask"
    },
    "maxCitations": {
      "type": "integer",
      "default": 5,
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum citations to include in the answer"
    },
    "conversationId": {
      "type": "string",
      "format": "uuid",
      "description": "Continue an existing conversation by ID"
    }
  },
  "additionalProperties": false
}
    arguments 27 lines
  • list_conversations auth-required 12h ago

    List the user's past chat conversations. Paginated.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "page": {
      "type": "integer",
      "default": 1,
      "minimum": 1
    },
    "pageSize": {
      "type": "integer",
      "default": 50,
      "maximum": 100,
      "minimum": 1
    }
  },
  "additionalProperties": false
}
    arguments 18 lines
  • get_conversation_messages auth-required never probed

    A conversation's message history, oldest first. Assistant messages carry the IDs of the bookmarks retrieved for that answer.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "conversationId"
  ],
  "properties": {
    "conversationId": {
      "type": "string",
      "format": "uuid",
      "description": "Conversation UUID"
    }
  },
  "additionalProperties": false
}
    arguments 15 lines
  • get_usage auth-required 12h ago

    The authenticated user's plan and quota usage: chat messages this month, syncs today, bookmark count, and whether an X account is connected. Limits are null on unlimited plans.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
    arguments 5 lines
  • get_changelog auth-required 12h ago

    machine-readable release history (public) - version, date, type, summary, migration notes on breaking entries. the X-Notice header's structured backstory.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
    arguments 5 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 066b8810ee99a929.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/066b8810ee99a929/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/066b8810ee99a929/badge.svg)](https://brick.blue/agent/066b8810ee99a929?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.