LinkupAPI

Reach B2B prospects from GPT

Category: Sales & CRM
Primary Subcategory: Sales Engagement & Outreach Automation

Integration details

Description

Automate your outreach across B2B channels, right from your GPT. Find prospects, research people and companies, personalize and send your messages, send connection requests, and read your inbox and replies, all from your own connected accounts.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Sales & CRM
Primary Subcategory: Sales Engagement & Outreach Automation
Secondary Subcategories: None listed
Brand: LinkupAPI
Access: Account required
First tracked: 2026-09-13
Tool count: 15
Geography: US

ChatGPT Plugin Discovery Score

ChatGPT Plugin discovery is coming soon

ChatGPT can surface a Plugin when it matches a user's request.Your Plugin Discovery Score measures how often yours appears.

No spam. Unsubscribe any time.

ChatGPT recommends Airtable when a user asks it to update a CRM. — ChatGPT surfaces Airtable because it matches the user's request.

Primary Subcategory

Competing in ChatGPT Sales Engagement & Outreach Automation

View Category

Listed in alphabetical order

Primary Subcategory

Amplemarket0/100

FirstTouchComing soonGet notified

Instantly.ai0/100

JobPhoning0/100

Lightmeter0/100

LinkupAPIComing soonGet notified

Tools

15 tools agents can invoke

Get the messages in one conversation thread (read-only; LinkedIn today). Identify it by conversation_id or profile_url.
Read your most recently received emails from your connected mailbox inbox (Gmail / Outlook / SMTP; read-only). Use this for requests like 'get my last N emails', 'check my inbox', or 'show my recent replies'. Bounces are flagged. account_id is optional when only one mailbox is connected; if the user names a specific mailbox (e.g. 'my gmail'), call linkupapi_list_accounts and pass the matching account_id. Pass unread_only to return only unread messages.
Profile & company lookups on a connected channel (read-only; LinkedIn today). Pick an `action` and pass the matching `params`: - get_me: no params — returns your own profile. - get: { profile_url | identifier, profile_urn? } — full public profile. - get_contact: { profile_url } — contact info (email, phone if visible). - search_people: { keyword?, location?, current_company?, company_url?, first_name?, last_name?, title?, industry?, school_url?, network?, offset?, limit? }. - search_companies: { keyword?, location?, sector?, company_size?, offset?, limit? }. - get_company: { company_url } — full company page data. - get_candidates: { job_id, total_results? } — applicants for a job (recruiter). - get_viewers: { count?, offset? } — who viewed your profile. - get_reactions: { profile_url, count?, cursor? } — reactions on a profile's posts. - get_comments: { profile_url, count?, cursor? } — comments authored by a profile.
List your inbox on a connected channel (read-only; LinkedIn today). category in INBOX/INMAIL/JOB/UNREAD/ARCHIVED/SPAM.
Connections & invitations lookups on a connected channel (read-only; LinkedIn today). Pick an `action`: - list_connections: { count?, offset? } — your connections (paginated, max 1000/call). - list_invitations: { count?, offset?, invitation_type? } — received invitations. - list_sent: { count?, offset?, invitation_type? } — invitations you sent. - check_invitation: { profile_url } — connection status with that profile. - recommendations: { count? } — people the channel recommends you connect with.
Recruiter / jobs lookups on a connected channel (read-only, requires recruiter access; LinkedIn today). Pick an `action`: - get_posts: { job_id?, count?, offset?, fetch_details? } — your posted jobs. Pass job_id to fetch one specific job. - get_candidates: { job_id, count?, offset? } — applicants for a job. - get_cv: { application_id } — download an applicant's CV (returned base64).
Post search & feed on a connected channel (read-only; LinkedIn today). Pick an `action`: - search: { keyword?, post_type?, sort_by?, post_date?, profile_url?, company_url?, author_company?, author_industry?, author_job_title?, mentions_member?, mentions_organization?, posted_by?, count?, offset? }. - get_feed: { count?, cursor? } — your home feed. - get_comments: { post_url, count?, offset? }. - get_reactions: { post_url, count?, offset? }.
Send a connection request on a connected channel (message <=300 chars; LinkedIn today). The recipient is notified immediately — cannot be recalled even if later withdrawn.
Send an email from your connected mailbox (Gmail / Outlook / SMTP). Delivered immediately from your mailbox and cannot be unsent. Body: pass `text` (plain text — often the best-delivering format for cold outreach), `html`, or both. account_id is optional when only one mailbox is connected; if the user names a specific mailbox (e.g. 'from my gmail'), call linkupapi_list_accounts and pass the matching account_id.
Send a DM on a connected channel (LinkedIn today). Delivered immediately and cannot be unsent. media_file = { data: base64, filename }. media_link = public URL.
Public-data enrichment & email tools. No account_id required — uses LinkupAPI's managed pipeline. Pick an `action` and provide the matching `params`: - enrich_person: { first_name, last_name, company_name } — finds the LinkedIn URL and returns the full profile. - enrich_company: { company_domain | company_url } — company info from a domain or URL. - find_email: { linkedin_url } OR { first_name, last_name, company_name | company_domain } — professional email finder. - validate_email: { email } — SMTP, MX & catch-all check. - reverse_email: { email } — finds the person behind a professional email (personal providers like gmail/yahoo are rejected). - search_jobs: { keywords, location?, country?, limit?, is_remote?, job_type? } — job board postings (Indeed/LinkedIn/Glassdoor). country drives the Indeed/Glassdoor region; if omitted it is inferred from location (e.g. 'Madrid, Spain' → spain), else defaults to france. job_type ∈ fulltime|parttime|contract|internship. - extract_employees: { company_url, limit? } — employees of a company (LinkedIn search). Cost: 1 credit per call.
Get full details of one account (status, country, webhook_url, timestamps).
Get the current credit balance for the authenticated API key.
List API call logs for the authenticated user. Filter by action (e.g. 'send', 'invite'), account_id, or status ('success' / 'error').
List every channel account connected to your API key — each with its account_id, platform (linkedin/email), mailbox address, provider (gmail/outlook), and status. Call this to pick the right account_id when the user names a specific account or mailbox (e.g. 'my gmail').

LinkupAPI FAQ

How do I improve a ChatGPT Plugin's discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are LinkupAPI alternatives on ChatGPT?

As of 2026-09-13, LinkupAPI competes with Reply.io, Outreach, Mixmax, Amplemarket, Instantly.ai, JobPhoning, Lightmeter, MimikFlow, OneUp Today, SalesBreaker GTM, Taverity, toflow.ai, FirstTouch in ChatGPT Sales Engagement & Outreach Automation, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.