Post to Tumblr via API

Publish to Tumblr from an AI agent, a CI pipeline, or any app — one call through the Socifyr MCP server, REST API, CLI, or TypeScript SDK. Connect Tumblr once, hand your agent a key, and it never sees your Tumblr tokens.

Tumblr API limits & specs

Caption limit50,000 characters
Posts per 24 hours250
Images per post1
Image formatsJPG, PNG, WEBP, GIF

Socifyr enforces these limits for you and returns a plain-language reason when a platform rejects a post. Specs reflect Tumblr’s published API as of November 2026.

Post to Tumblr in one call

curl -X POST https://api.socifyr.com/api/content/text \
  -H "Authorization: Bearer sk_your_key" \
  -H "X-Workspace-Id: ws_abc123" \
  -H "Content-Type: application/json" \
  -d '{ "connections": ["tumblr-mybrand"], "text": "Hello, Tumblr!" }'

Prefer an agent? Add the Socifyr MCP server and ask it to “post this to Tumblr.” Prefer code? The same request works from the CLI (socifyr post) and the TypeScript SDK.

Post to other platforms

Publish to Tumblr in five minutes

Hand your agent one key and publish across 18 platforms. Flat pricing from $9.99, no card to start.