head to head/Developer Tools

Ontoloop vs Send21

Neck and neck on boosts. Profiles, pricing and deals below.

Ontoloop

Connect Claude Code and Codex to Ontoloop over MCP

community boosts

⚡ 0

pricing

Freemium

what it is

How to connect to Ontoloop's remote MCP server: one command plus a browser sign-in for Claude Code and Codex, a URL for Claude desktop, Claude on the web and WorkBuddy; what agents can do once connected, why writes need a human to confirm them, and what to do when authorization expires.

Send21

Try a crypto pay link on testnet, no account

community boosts

⚡ 0

pricing

Freemium

what it is

Make a real test payment from your own wallet on Bitcoin, Solana, Ethereum, Base, Arbitrum and Polygon test networks. No account, no email.