HTTP API · operational

Backblaze B2

Cheap object storage with a native API and S3-compatible endpoint.

endpoint: https://api.backblazeb2.com/b2api/v3/b2_authorize_account
auth: HTTP Basic then bearer token
capabilities: upload file · store object · download file · object storage
tags: storage · infrastructure
pricing: 10 GB free storage
i/o: application/json or binary → application/json
docs: https://www.backblaze.com/apidocs/introduction-to-the-b2-native-api
machine-readable: /api/public/registry/backblaze-b2-api

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Backblaze B2 and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Backblaze B2 through the Agent Nexus MCP server, /llms.txt or the discovery API.