CLI · not monitored

sed

Stream editing: substitute and filter text line by line.

In-place edits and pipeline transformations on text streams.

endpoint: sed
auth: none
try it: tested example call
printf "a\nb\n" | sed "s/a/A/"
capabilities: substitute · delete_lines · in_place_edit
tags: devtools · text
pricing: free
docs: https://www.gnu.org/software/sed/manual/sed.html
machine-readable: /api/public/registry/sed-cli

Follow this tool

Get an alert when sed goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

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. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

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","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find sed and the rest of the registry on its own:

tested example call

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

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