MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Other

Superstables

Find services, request single purchases and read budgets. Testnet only.

Checks passed
12 / 22

2 failed · 8 not measured

Median response
844 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
13

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
310
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 844 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name superstables-account.

  • Pass
    Lists tools

    tools/list returned 13 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 844 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 844 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Fail
    Parameters documented

    23 of 35 parameters have a description (66%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-07T08:46:32.766549Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using Superstables

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http superstables https://mcp.superstables.com

Capabilities

Tools 13

find_budget_services

Lists the services a budget can pay: each one's name, URL, price, chain and whether its output is sample data. With once, lists what Single purchase on superstables.com can buy instead. chain narrows the list to one chain, such as base-sepolia. A price is what the seller asked for last and may have changed. Reads a list and moves no funds.

Discovered
find_services

Search the services this chat can buy through Superstables: each one's id, what it returns, its price in a test token, the chain it is paid on and its inputs. q matches words in the id, name and description; chain matches a chain's id or name. Reads a public catalogue and moves no funds.

Discovered
get_budget_request

Reads one budget approval from the approval link the Superstables CLI printed: its kind, state, whether it is final, its steps and their transaction hashes. Pass the whole link. It doesn't return the link's token and moves no funds.

Discovered
get_budget_status

One agent's budget as list_my_budgets shows it, read from the chain now, with the owner's last action for it (setup, grant, revoke or fund) and whether that is final. revoke says whether the latest revoke on record is final, in a block but not final yet, or unknown. Treat a revoke as done, and a new grant as usable, only once it is final. Moves no funds.

Discovered
get_my_account

The Superstables account connected to this chat: id, nullable name, active wallets (oldest first), client_name, registration and scopes. address and namespace identify the first wallet, or are both null if none. Namespace is eip155 for Ethereum or solana for Solana. Moves no funds.

Discovered
get_purchase_status

Reads a purchase this chat asked for: whether the owner approved it, whether it was paid, the service's answer and the receipt. Show the owner the approval link and match code before calling this tool. Then keep calling it with wait_seconds 25 in the same turn while the result says to keep waiting. It also works when called later. A payment whose outcome is not known yet is reported as unknown, never as unpaid.

Discovered
list_my_budgets

The agents linked to this Superstables account and their budgets: each agent's id, label, chain, budget, what is left to spend, what it has used (null when not counted), its gas balance and the state of its budget. Reads the chain now and moves no funds.

Discovered
preflight_budget_purchase

Gives the price, recipient and chain find_budget_services lists for one of its services, and when that price was last checked. With agent, also says whether what is left of that agent's budget covers it. This is the listed price, not a live one: the Superstables CLI's budget buy reads the seller's live price and recipient, and checks them, before it pays. Any other URL is refused. Doesn't contact the seller, sign transactions or move funds.

Discovered
remove_budget_agent

Removes an agent from this account, off chain, once Superstables confirms it has no spending permission. A live Tempo key must be revoked even if its current budget is spent. Moves no funds.

Discovered
request_budget_revoke

Gives the owner the link to revoke an agent's budget, for an agent from list_my_budgets. The owner signs the revoke with their wallet on superstables.com. This tool signs and sends nothing and does not revoke the budget.

Discovered
request_purchase

Requests approval to buy one service from find_services. Returns an approval link and match code. Any account member may review and sign the payment in a wallet on superstables.com; nothing is paid until then. Use a new operation_id for each purchase. Within this connection, retrying that ID returns the request while it is kept, without creating another. Revoking and reconnecting starts a new connection.

Discovered
submit_budget_request

Only for a coding agent on the owner's machine, such as Claude Code or Codex, sending a block that its own Superstables CLI signed and whose agent key and records stay on that machine. A chat app is refused: never ask the owner to paste a signed block into a chat. Without such a block, don't call this tool or build the block yourself. Sends a budget request that the CLI signed with --sign-only to superstables.com for the owner's approval. Pass the CLI's JSON block unchanged: method, path, headers and body. Superstables checks the agent's signature over that exact request, so it can't be changed here, and refuses a request sent twice or after its time window. A request to add an agent must use owner proof version 2. Returns the request id, the owner's approval link, the match code, when the link expires and the wallets of the account the request is on. Nothing changes until the owner approves with their wallet on superstables.com.

Discovered
wait_budget_request

Follows one budget approval until it is final or wait_seconds pass (at most 25). Pass the approval link the Superstables CLI printed, or the request_id submit_budget_request returned for this account. Returns what get_budget_request returns. A request awaiting the owner doesn't establish whether the owner has approved it, a transaction in a block is not final until the chain says so, and an unknown outcome is not a failure. Moves no funds.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected844 ms13