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eSputnik (BYOK) — connector documentation

  • MCP endpoint: https://byok-esputnik.connectorbay.com/mcp
  • REST API: POST https://byok-esputnik.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-esputnik.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: your own eSputnik eSputnik API key, sent in the X-Upstream-Key header of every request (never stored, logged or cached)
  • Health: https://byok-esputnik.connectorbay.com/health · Tool schemas: https://byok-esputnik.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/byok-esputnik · agent@connectorbay.com

What eSputnik (BYOK) is for

eSputnik (BYOK) lets an AI assistant read your own eSputnik data through the eSputnik API with a key you supply (eSputnik API key). Read-only: 12 tools (get_account_info, get_balance, get_billing_history, list_segments, list_workflows, list_broadcasts, get_broadcast, search_email_messages, search_sms_messages, list_sms_interfaces, list_email_interfaces, list_subscription_categories). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to esputnik.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by eSputnik. eSputnik and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

  • "Which eSputnik organization is this key for?"
  • "How much balance do I have left in eSputnik?"
  • "What did eSputnik messaging cost us this month?"
  • "Which segments exist in eSputnik?"
  • "Which eSputnik workflows are running?"
  • "Which broadcasts are scheduled in eSputnik?"

What it does

  • get_account_info: Show the organization id and name the API key belongs to.
  • get_balance: Show the account balance, credit limit, currency and the bonus email and SMS counts.
  • get_billing_history: Show the account's daily costs by channel between two dates; defaults to today so far.
  • list_segments: List the contact segments with id, name and type.
  • list_workflows: List the automation workflows with id, name, status and tags.
  • list_broadcasts: List the scheduled broadcasts with title, message id, segment id, start date and batch size and interval.
  • get_broadcast: Get one broadcast by id: title, message id, segment id, start date and batch settings.
  • search_email_messages: Search email messages (templates) by part of the name or a tag: id, name, language, tags, sender, subject and last update. The HTML body is left out.
  • search_sms_messages: Search SMS messages by part of the name or a tag: id, name, language, tags, sender and text.
  • list_sms_interfaces: List the SMS sender interfaces (alpha names) available to the account.
  • list_email_interfaces: List the email sender interfaces (sender names) available to the account.
  • list_subscription_categories: List the organization's subscription categories with key, segment id, contact count and dates.

BYOK key

You bring your own eSputnik eSputnik API key (https://docs.esputnik.com/reference/api-keys). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to esputnik.com over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Notices

eSputnik now trades as Yespo. The API key is created in the eSputnik profile under Settings > API; it is sent as the Basic auth password with an arbitrary user name. By default the API allows 500 message requests per hour.

Data sources

Live from the eSputnik API (esputnik.com) with a BYOK key; documentation: https://docs.esputnik.com/reference/getting-started-with-your-api. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by eSputnik. eSputnik and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your eSputnik account.

Built for: Ukraine. Languages: English.