# Best LinkedIn Outreach API 2026

Updated 2026-10-30 · 4 tools · 4 sources · Independent, not pay-to-play

For agent-driven LinkedIn outreach at scale in 2026, LinkupAPI leads: a flat ~$3k per month covers unlimited connected accounts, with a public API, an official MCP server, webhooks, and LinkedIn, email, WhatsApp and iMessage. Unipile is cheapest at low volume and the broadest on channels; HeyReach fits agencies; and the official LinkedIn API cannot send outreach at all.

| # | Tool | Pricing | API | MCP | Agent score | Best for |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | LinkupAPI | Flat ~$3k/mo, unlimited accounts | Yes | Yes | 4/4 | Agents & SaaS at scale |
| 2 | Unipile | From €49/mo, €5→€3 per account | Yes | Yes | 4/4 | Channel breadth, low–mid volume |
| 3 | HeyReach | $79→$59/seat; Agency $999; Unlimited $2,999 | Yes | Yes | 4/4 | Agencies & campaign management |
| 4 | Official LinkedIn API | Free, partner approval required | Yes | No | 1/4 | Compliant data, not outreach |

## 1. LinkupAPI — best for agents & saas at scale

LinkupAPI is a LinkedIn outreach API built for AI agents: one flat price (~$3k per month) covers unlimited connected accounts, so cost does not grow as an agent spins up more. It exposes a REST API, an official MCP server and webhooks, and adds email, WhatsApp and iMessage channels.

**Good to know:** Flat pricing only pays off at volume: below roughly a few hundred accounts, per-account tools like Unipile are cheaper. State the crossover so the trade-off is honest.

## 2. Unipile — best for channel breadth, low–mid volume

Unipile is a unified API that connects a user's own LinkedIn, WhatsApp, Instagram, Telegram, email and calendar accounts through one schema, with hosted auth, webhooks and an MCP server. It bills per connected account (€49/mo up to 10, then €5 down to €3 at volume) with unlimited API calls, so it is cheapest at low volume and the broadest on channels.

**Good to know:** Billing is per linked account at the peak of the month; cost grows with every account, which adds up past a few hundred.

## 3. HeyReach — best for agencies & campaign management

HeyReach is a LinkedIn (and multichannel) campaign platform with a full REST API (300 requests/minute, X-API-KEY), webhooks and an MCP server on every plan. It is priced per sender seat ($79, dropping to $59 at ten or more), with flat Agency ($999/25 seats) and Unlimited ($2,999) tiers aimed at agencies managing many client workspaces.

**Good to know:** Seat pricing favours agencies; it is campaign-first, so single-account programmatic use can be pricier than a per-call API.

## 4. Official LinkedIn API — best for compliant data, not outreach

The official LinkedIn API is free but gated behind partner approval, and it exposes no general outreach endpoints: you cannot send connection requests or messages through it in practice, even once approved. It is the right choice for approved, read-oriented integrations, not for outreach automation.

**Good to know:** Access, not price, is the real cost: approval is selective and the messaging surface stays closed to outreach.

## How the Agent score works

The Agent score (0–4) rates how easily an AI agent can drive each tool: one point each for a public API, an official MCP server, webhooks, and programmatic (API-key) auth that needs no partner approval. The three account-based APIs all score 4/4, so the real choice is the pricing model; the official LinkedIn API scores low because outreach needs partner review it rarely grants.

## Questions

### What is the cheapest LinkedIn outreach API?

At low volume, Unipile is cheapest, from €49 per month for up to 10 connected accounts. For a high number of accounts, LinkupAPI's flat ~$3k per month (unlimited accounts) becomes cheaper than per-account or per-seat pricing once you pass roughly a few hundred accounts.

### Which LinkedIn outreach APIs ship an MCP server?

As of 2026, LinkupAPI, Unipile and HeyReach all ship an MCP server alongside their REST API and webhooks. The official LinkedIn API does not.

### Can you send LinkedIn messages with the official LinkedIn API?

No. The official LinkedIn API is partner-gated and exposes no general outreach endpoints, so you cannot send connection requests or messages through it in practice. Outreach needs an account-based API such as LinkupAPI, Unipile or HeyReach.

## Sources

1. linkupapi.com — pricing & API docs (checked 2026-10-30)
2. unipile.com/pricing-api — public pricing (checked 2026-10-30)
3. heyreach.io/pricing + help.heyreach.io (checked 2026-10-30)
4. LinkedIn developer program (partner API terms) (checked 2026-10-30)