The request "contacts" does not name a product or a platform, so the best-fit tools depend on what you want to do with contacts. For managing a contact list through an API, Resend 3 and HubSpot 4 expose contact create, read and list actions, and Twilio SendGrid 2 exposes contact add/update and lookup actions.
A question back: What do you want to do with contacts: manage a contact list through an API, send email or SMS to them, or look up contact details by phone or email?
- 1
Resendresend.comverified and signed
Email platform whose contacts endpoints create, retrieve single, and list contacts 13.
+12 community tools built for it
for agents: GET /contacts · GET /contacts/{id} · POST /contacts
- 2
HubSpothubspot.comverified and signed
CRM platform whose actions get, find and create contacts in HubSpot 14.
+58 community tools built for it
for agents: get-contact · find-contact · create-contact
- 3
Twilio SendGridtwilio.comverified and signed
Email API whose contact actions add or update a contact and get contacts by ID or sample list 12.
official:API · Email Activity (beta)+13 community tools built for it
for agents: GET_mc-contats · GET_mc-contacts-id · PUT_mc-contacts
- 4
Apideck CRM APIapideck.comverified and signed
Unified CRM API whose actions list, get and create contacts across connected systems 16.
official:API · CRM API
for agents: contactsOne · contactsAll · contactsAdd
- 5
ContactAPIcontactapi.devwebsite read, tools not yet checked
Open-source API that saves contacts with a POST and manages them with CRUD, listing them newest first.
+1 community tools built for it
Sources
- 1ContactAPI, an open-source API to save contactscontactapi.dev · read 2026-10-29
- 2SendGrid Email API and Email Marketing Campaigns | Twiliotwilio.com · read 2026-10-29
- 3Resend · Email for developersresend.com · read 2026-10-29
- 4HubSpot | Software & Tools for your Business - Homepagehubspot.com · read 2026-10-29
- 6Apideck Unified API developer docs - Apideckdevelopers.apideck.com · read 2026-10-29
- 12Email Activity (beta): declares "GET_mc-contats" (the record we read and signed)unfragile.ai · read 2026-10-24
- 13Resend: declares "GET /contacts" (the record we read and signed)unfragile.ai · read 2026-10-24
- 14HubSpot (Activepieces): declares "get-contact" (the record we read and signed)unfragile.ai · read 2026-10-24
- 16CRM API: declares "contactsOne" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
· ContactAPI website read, tools not yet checked
An open-source API to save contacts with a single POST and manage them with simple CRUD.
GET_mc-contats · Email Activity (beta) verified and signed
Get Sample Contacts
GET /contacts · Resend verified and signed
Retrieve a list of contacts
get-contact · HubSpot (Activepieces) verified and signed
Get Contact — Gets a contact by its ID.
api · twilio verified and signed
contacts_list · IX-API verified and signed
List available contacts managed by the authorized account.
contactsOne · CRM API verified and signed
Get contact
list_contacts · sms-marketing verified and signed
List contacts in your workspace with pagination and optional filters. Returns contacts with id, phone, first_name, last_name, email, tags, metadata, opted_out status, and timestamps.
GetParticipantDetails · Cloudflare API verified and signed
Fetch details of a participant
contactSearch · Lusha MCP Server found in code, not yet checked
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.