Any “API-only” social-media tools for scheduling/analytics?

I’m juggling 5 small products right now.

for marketing i mostly need to:

• schedule tweets / linkedin posts
• pull basic analytics (impressions, clicks, followers)
• maybe auto-cross-post and run a/b text tests

but i never touch the dashboards — everything runs through scripts and cron jobs. most of the well-known tools charge for the big ui + multi-seat stuff i don’t use.

Does anyone know services that are:

• api-first (or api-only)
• fair pricing for low to mid volume
• decent docs + token management
• ideally no hard limits on number of projects / brands

open-source self-hosted is fine too if setup isn’t a nightmare.

What have you tried that actually worked? appreciate any leads or horror stories so i don’t waste another weekend on the wrong integration.