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

Read-only probes

MCP server · Code & DevOps

Clearstream MCP by usefulapi

By usefulapi.io Verified namespace

Read lists, subscribers, tags and texts; send texts and change subscribers in Clearstream.

WebsiteSource code
Connect to Clearstream MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
125 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
15

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?
400
Publisher identityCan the publisher be traced to its source?
402

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 125 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name clearstream-mcp.

  • Pass
    Lists tools

    tools/list returned 15 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 125 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 125 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.

  • Pass
    Parameters documented

    43 of 43 parameters have a description (100%). 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.

  • Pass
    Source repo linked

    A 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 2026-11-10T23:35:10.53344Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Clearstream MCP by usefulapi

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 clearstream-mcp-by-usefulapi https://clearstream.usefulapi.io/mcp

Capabilities

Tools 15

clearstream_add_subscriber

Create or add one subscriber, with optional lists and tags. By default the subscriber must confirm opt-in by text. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/subscribers.

Discovered
clearstream_add_subscriber_to_list

Add one mobile number to a subscriber list. Locked lists cannot change. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/lists/{id}/subscribers.

Discovered
clearstream_get_account

Get the Clearstream account behind the API key: name, plan and settings. Good first call to confirm which account is connected. Clearstream API: GET /v1/account.

Discovered
clearstream_get_list

Get one subscriber list: name, subscriber count, active texting subscriber count and sync status. Clearstream API: GET /v1/lists/{id}.

Discovered
clearstream_get_subscriber

Get one subscriber by mobile number: name, opt-in status, lists and tags. Clearstream API: GET /v1/subscribers/{number}.

Discovered
clearstream_get_text_stats

Get text volume statistics for a date range (YYYY-MM-DD, inclusive). Clearstream API: GET /v1/stats/texts.

Discovered
clearstream_list_lists

List the subscriber lists (groups) in the account, with subscriber counts. Filter by name or locked state. Clearstream API: GET /v1/lists.

Discovered
clearstream_list_numbers

List the shortcodes and longcodes this account can send texts from, and which one is the default. Clearstream API: GET /v1/numbers.

Discovered
clearstream_list_subscribers

Search the account's subscribers by name or mobile number. Clearstream API: GET /v1/subscribers.

Discovered
clearstream_list_subscribers_of_list

List the subscribers in one list, with optional name filters. Clearstream API: GET /v1/lists/{id}/subscribers.

Discovered
clearstream_list_tags

List the subscriber tags in the account. Clearstream API: GET /v1/tags.

Discovered
clearstream_list_texts

List texts in the account's inbox history, incoming or outgoing, optionally for one number. Use the cursor from a previous reply for the next page. Clearstream API: GET /v1/texts.

Discovered
clearstream_remove_subscriber_from_list

Remove one mobile number from a subscriber list. The subscriber's opt-in status does not change. Locked lists cannot change. Clearstream API: DELETE /v1/lists/{id}/subscribers/{number}.

Discovered
clearstream_send_text

Send one SMS to one or more numbers. This sends real messages to real phones and cannot be undone. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Opted-out numbers are skipped (for a list of numbers) or cause an error (for one number). Clearstream API: POST /v1/texts.

Discovered
clearstream_tag_subscribers

Add a tag to up to 100 subscribers by mobile number. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/tags/{id}/subscribers.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected125 ms15

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