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Twilio Phone Numbers (BYOK) — connector documentation

  • MCP endpoint: https://byok-twilio-incoming-numbers.connectorbay.com/mcp
  • REST API: POST https://byok-twilio-incoming-numbers.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-twilio-incoming-numbers.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: your own Twilio Phone Numbers Account SID or API key SID (use a restricted API key, SID starts with SK, rather than the main Auth Token where possible), sent in the X-Upstream-Key header and the Auth Token, or the secret of the API key in X-Upstream-Key-2 of every request (never stored, logged or cached)
  • Health: https://byok-twilio-incoming-numbers.connectorbay.com/health · Tool schemas: https://byok-twilio-incoming-numbers.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/byok-twilio-incoming-numbers · agent@connectorbay.com

What Twilio Phone Numbers (BYOK) is for

Twilio Phone Numbers (BYOK) lets an AI assistant read your own Twilio Phone Numbers data through the Twilio Phone Numbers API with a key you supply (Account SID or API key SID (use a restricted API key, SID starts with SK, rather than the main Auth Token where possible)). Read-only: 11 tools (list_incoming_numbers, list_local_numbers, list_mobile_numbers, list_toll_free_numbers, get_incoming_number, list_outgoing_caller_ids, list_short_codes, list_available_countries, search_available_local_numbers, search_available_toll_free_numbers, search_available_mobile_numbers). 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 api.twilio.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Twilio Phone Numbers. Twilio Phone Numbers 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 Twilio phone numbers do I own and what can they do?"
  • "Which local numbers do I own in Twilio?"
  • "Which mobile numbers do I own in Twilio?"
  • "Which toll-free numbers do I own in Twilio?"
  • "What can phone number PN... do?"
  • "Which caller IDs have I verified in Twilio?"

What it does

  • list_incoming_numbers: List all phone numbers owned by the account with capabilities, status, origin, trunk, emergency status and bundle. Webhook URLs are not returned.
  • list_local_numbers: List the owned local-type phone numbers only.
  • list_mobile_numbers: List the owned mobile-type phone numbers only.
  • list_toll_free_numbers: List the owned toll-free phone numbers only.
  • get_incoming_number: Get one owned phone number by SID: capabilities, status, origin, trunk, emergency status and bundle.
  • list_outgoing_caller_ids: List verified outgoing caller IDs (numbers you may present as caller ID without owning them).
  • list_short_codes: List the SMS short codes assigned to the account.
  • list_available_countries: List countries where Twilio has numbers to rent, with country code.
  • search_available_local_numbers: Search local phone numbers available to rent in one country, by area code, digit pattern, capability or region. Only searches; nothing is purchased.
  • search_available_toll_free_numbers: Search toll-free phone numbers available to rent in one country. Only searches; nothing is purchased.
  • search_available_mobile_numbers: Search mobile-type phone numbers available to rent in one country. Only searches; nothing is purchased.

BYOK key

You bring your own Twilio Phone Numbers Account SID or API key SID (use a restricted API key, SID starts with SK, rather than the main Auth Token where possible) (https://www.twilio.com/docs/iam/api-keys/keys-in-console). 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 api.twilio.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.

Data sources

Live from the Twilio Phone Numbers API (api.twilio.com) with a BYOK key; documentation: https://www.twilio.com/docs/phone-numbers/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 Twilio Phone Numbers. Twilio Phone Numbers 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 Twilio Phone Numbers account.

Built for: Worldwide. Languages: English.