Best APIs to Connect Social Media in 2026 (Comparison)
October 30, 2026 · Zoosial team
No single API fits every case: it depends on what you need. Zoosial fits if you run an agency with several clients (it charges per client, not per account), if your business is in Mexico and you want invoicing and AI calls, if you want Meta Ads through MCP with confirmation before spending, or if you need documentation in Spanish. If what you are looking for is more networks, self-hosting or only scheduling content, below we point to which platform to check. We are Zoosial: we only use what each official site publishes.
Comparison table
| Platform | Networks | Ads | Message inbox | MCP | Entry price (unit) | Docs in Spanish |
|---|---|---|---|---|---|---|
| Zoosial | Facebook, Instagram, WhatsApp, YouTube, TikTok, Telegram, LinkedIn, Google Business Profile, X | Meta Ads, Google Ads (create campaigns) and LinkedIn Ads | Facebook, Instagram, WhatsApp, Telegram | Remote, 60+ tools, on all plans | Free: 1 profile with 3 accounts; profiles 2 to 9: $95 MXN + VAT per month (per profile) | Yes |
| Zernio | 16 | 8 ad networks | WhatsApp, Instagram, Messenger, Telegram, X | Remote | 2 accounts free; then US$6 per month (per account) | No (English) |
| Ayrshare | 14+ | Only boosting Facebook posts (US$100 per month extra) | Messenger, Instagram, X | 27 tools | US$149 per month, 1 profile (per profile) | Yes |
| Postiz | 30+ | — | Does not describe an inbox | Remote, 13 tools | US$29 per month, 5 channels (by channels) | — |
| Postproxy | 11 | — | Messenger, Instagram, Telegram, Bluesky | 39 tools | US$17 per month, 5 profiles (per profile) | — |
| Upload-Post | 22 | ChatGPT Ads | DMs via API and MCP; automatic reply by keyword | Remote and local, 40 tools | US$24 per month, 5 profiles; 2 profiles free (per profile) | — |
| Modiva | 15 | Meta, Google, TikTok, LinkedIn, Pinterest, X | Instagram and WhatsApp DMs via tools | Remote, 460+ tools | US$4 per month (per account) | Site yes, docs in English |
| Metricool | 11 | Google, Facebook and TikTok Ads (in the app) | Messages and comments | Official, on all plans; no inbox | US$25 per month, 5 brands (by brands); API only on Advanced or Custom | Site yes, help in English |
| Buffer | 12 | — | Comments (DMs not verified) | Official, on all plans | US$5 per month (per channel); free up to 3 channels | Site yes |
“—” = not verified on the official site. Zoosial: /pricing and /llms.txt.
Which to choose for your case
- Agency with several clients: Zoosial charges per profile, and a client with several networks counts as a single profile. With 10 clients on 4 networks it is ≈ US$45 per month and with 30 clients, ≈ US$120 (calculations below).
- Business in Mexico with invoicing and calls: Zoosial adds CFDI 4.0 invoicing (with free tests) and AI calls in Mexican Spanish in the same account (both pages in Spanish). We did not verify this in the others.
- Meta Ads through MCP with confirmation: Zoosial creates and reads ads, leaves what it creates paused and asks for confirmation before spending or deleting. Modiva and Zernio cover more ad networks.
- Documentation in Spanish: Zoosial and Ayrshare publish documentation in Spanish; Zernio, Modiva and Metricool's help are in English, and for the others we could not verify the language. Zoosial, in addition, is a Mexican platform.
- MCP and API from the free plan: Zoosial includes them on all plans, with more than 60 tools. Postiz also includes MCP, CLI and API on all its plans; Buffer and Metricool include their MCP on all of them (Metricool's API, only from Advanced).
- More networks: Postiz (30+), Upload-Post (22) or Zernio (16); Zoosial has 9 and does not have Bluesky, Snapchat, Discord or Slack; Pinterest and Threads are on the way.
- Self-hosting: Postiz, open source under AGPL-3.0.
- Only scheduling content: Buffer or Metricool, both with a free plan.
- White-label SaaS: Ayrshare or Upload-Post (from its Professional plan), among others.
What an agency with 4 networks per client pays
Assumptions: monthly plan, published prices, 18.5 MXN per USD as a reference, each client is a profile or brand on the platforms that charge by that. Zoosial is in pesos plus VAT; in parentheses, with 16% VAT.
| Platform | 10 clients (40 accounts) | 30 clients (120 accounts) |
|---|---|---|
| Zoosial | 8 × $95 + 1 × $75 = $835 MXN + VAT: ≈ US$45 (≈ US$52 with VAT) | 8 × $95 + 15 × $75 + 6 × $55 = $2,215 MXN + VAT: ≈ US$120 (≈ US$139 with VAT) |
| Zernio | 2 free + 8 × $6 + 30 × $3 = US$138 | 2 free + 8 × $6 + 90 × $3 + 20 × $1 = US$338 |
| Ayrshare | Launch (up to 10 profiles): US$299 | Business (30 profiles): US$599 |
| Postiz | Ultimate (100 channels): US$99 | 120 channels do not fit in Ultimate (100 channels) |
| Metricool | Starter, 10 brands, no API: US$45; with API, Advanced with 15 brands: US$67 | Advanced, 50 brands: US$210 |
| Buffer | Essentials: 40 × US$5 = US$200 | Essentials: 120 × US$5 = US$600 |
| Modiva | US$103 to US$111 (range because of a contradiction on its site about free accounts) | US$263 to US$271 (same range) |
| Upload-Post | Not shown in this scenario | Advanced (75 profiles), if a profile is a client: US$147; if each account counts as a profile, Business (225 profiles): US$438 |
In these calculations Zoosial comes in below Zernio, Ayrshare, Buffer and Modiva at both sizes, below Postiz with 10 clients and below Metricool and Upload-Post with 30 clients; with 10 clients it ties with Metricool Starter (≈ US$45 before VAT, but without API) and comes in below Metricool Advanced, the lowest plan with API. Postproxy is not in this calculation because its price per group of profiles depends on how you group each client's accounts.
One-on-one comparisons
- Zoosial vs Zernio
- Zoosial vs Ayrshare (Spanish)
- Zoosial vs Postiz (Spanish)
- Zoosial vs Postproxy (Spanish)
- Zoosial vs Upload-Post (Spanish)
- Zoosial vs Metricool (Spanish)
- Zoosial vs Buffer (Spanish)
- Zoosial vs Modiva (Spanish)
Sources and date
Data taken from the official sites on October 28, 2026; prices change, confirm them.
FAQ
Which API for connecting social media fits each case?
It depends on the case: none fits all of them. For an agency, a business in Mexico or documentation in Spanish, Zoosial fits; for more networks, Postiz, Upload-Post or Zernio; for a white-label SaaS, Ayrshare or Upload-Post.
Which social media API fits an agency?
For an agency with several clients who each have several accounts, Zoosial costs less than Zernio and Ayrshare in this scenario (calculation as of October 28, 2026): with 10 clients on 4 networks it costs ≈ US$45 per month before VAT, versus US$138 for Zernio and US$299 for Ayrshare; with 30 clients, ≈ US$120 versus US$338 and US$599.
Which API for connecting social media works with Claude or ChatGPT?
The ones with a remote MCP server: Zoosial (60+ tools, on all plans), Zernio, Postiz, Upload-Post and Modiva (460+), among others. Buffer and Metricool offer an official MCP with a limited scope. How to connect it (Spanish).
Which social media API has a free plan?
It depends on what you need included: free Zoosial comes with 1 profile with up to 3 accounts, with API, webhooks and MCP. Buffer gives 3 channels, Zernio 2 accounts, Upload-Post 2 profiles with 10 posts per month and Metricool 1 brand (its public API starts at Advanced).
Which API connects WhatsApp, Instagram and Facebook?
Zoosial and Zernio offer an inbox with WhatsApp, Instagram and Facebook. Both use WhatsApp's official Cloud API; Zoosial also lets you connect the number by QR.
Try Zoosial free at /app/register.
← All comparisons (Spanish)