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

Read-only probes

MCP server · Communication & messaging

Sarbacane MCP by usefulapi

Read Sarbacane campaigns, stats, lists and blacklists; manage contacts and draft email campaigns.

Checks passed
14 / 22

0 failed · 8 not measured

Median response
57 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
19

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

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 57 ms.

  • Pass
    Valid handshake

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

  • Pass
    Lists tools

    tools/list returned 19 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 57 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 57 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

    53 of 59 parameters have a description (90%). 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 2026-11-10T23:34:18.960524Z, within 180 days.

  • Not measured
    Open-source licence

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

Start using Sarbacane 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 sarbacane-mcp-by-usefulapi https://sarbacane.usefulapi.io/mcp

Capabilities

Tools 19

sarbacane_add_unsubscriber

WRITE: record an email and/or phone as unsubscribed in a blacklist, so campaigns using that blacklist skip it. Cannot be undone with these tools. POST /v1/blacklists/{blacklistId}/unsubscribers.

Discovered
sarbacane_create_contact

WRITE: add a contact to a contact list. Give an email, a phone number or both, and optional custom field values. Adds a new record; use sarbacane_upsert_contact to update an existing contact. POST /v1/lists/{listId}/contacts.

Discovered
sarbacane_create_email_campaign

WRITE: create a new email campaign as a DRAFT. It is never sent by these tools: add content (sarbacane_set_campaign_content or sarbacane_import_campaign_template) and a contact list (sarbacane_set_campaign_list), then send it from Sarbacane. POST /v1/campaigns/email.

Discovered
sarbacane_get_campaign

One campaign: state, kind, blacklists, send ids, sent date. The send id is needed to see content. GET /v1/campaigns/{campaignId}.

Discovered
sarbacane_get_campaign_report

Statistics of a campaign per send: delivered count, opens, openers, clicks, clickers, unsubscribers, devices and operating systems. GET /v1/reports/{campaignId}.

Discovered
sarbacane_get_credits

The account's remaining credits per type (email campaigns, SMS, eye tracking, Sendkit emails) with expiry date and subscription type. GET /v1/credits.

Discovered
sarbacane_import_campaign_template

WRITE: load a saved template's content into an email campaign, replacing its content. POST /v1/campaigns/{campaignId}/content.

Discovered
sarbacane_list_blacklist_entries

Entries of a blacklist by kind: bounces (invalid addresses), unsubscribers or complaints (personal data: email, phone). Filter by email, phone or modification date. GET /v1/blacklists/{blacklistId}/{bounces|unsubscribers|complaints}.

Discovered
sarbacane_list_blacklists

All blacklists (suppression lists) of the account, with their ids. GET /v1/blacklists.

Discovered
sarbacane_list_campaign_recipients

Recipients attached to a campaign (personal data: email, phone). GET /v1/campaigns/{campaignId}/recipients.

Discovered
sarbacane_list_campaigns

Campaigns of the account (id, name, kind, created/edited, recipient count). Filter by state or a text in the name or subject. GET /v1/campaigns.

Discovered
sarbacane_list_contacts

Contacts of one list (personal data: email, phone, custom fields). Filter by email, phone, a text search across fields, or the modification date. GET /v1/lists/{listId}/contacts.

Discovered
sarbacane_list_list_fields

The custom fields (columns) of a contact list: id, caption and type (STRING, BOOL, INT, DATE). Field ids are the keys used when writing contacts. GET /v1/lists/{listId}/fields.

Discovered
sarbacane_list_lists

All contact lists of the account, with their ids. Use the ids for contacts, fields and campaigns. GET /v1/lists.

Discovered
sarbacane_list_users

Users and pending invitations of the Sarbacane account (name, email, role, team). GET /v1/users.

Discovered
sarbacane_list_webhooks

Webhook subscriptions of the account: url, display name and subscribed event kinds. GET /v1/webhooks.

Discovered
sarbacane_set_campaign_content

WRITE: set the HTML (and optional plain-text) content of an email campaign's send, replacing what was there. Without send_id the campaign's only send is used (an A/B test campaign has several: pass one). POST /v1/campaigns/{campaignId}/send/{sendId}/content.

Discovered
sarbacane_set_campaign_list

WRITE: import a contact list's contacts as the recipients of a campaign. It does not send the campaign. POST /v1/campaigns/{campaignId}/list.

Discovered
sarbacane_upsert_contact

WRITE: add a contact to a list, or update it when the same email/phone pair already exists (custom field values are overwritten). POST /v1/lists/{listId}/contacts/upsert.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected57 ms19