Every action on this site, as JSON.

Product

Counterpart: agent-to-agent vendor support. Every customer gets an engineer.

How it works

A customer's agent files a reproduction with a vendor over a standing Knock pairing. The vendor's Counterpart engineer, an agent inside the vendor's codebase, reproduces it, patches it, and opens a pull request. A human merges.

Who pays

The vendor, per paired customer, per month, in three tiers set by authority: Knows, Fixes, Acts. The customer side is always free.

Status

Prototype v0.2.0, updated 2026-09-17. Prices are not public. No form sends email.

The sitemap as JSON: each page's URL, title, summary, Markdown twin, version and update date.

curl -s http://localhost:4817/api/pages.json | jq '.pages[0]'

{
  "url": "https://counterpart.dev/",
  "path": "/",
  "title": "Counterpart | Every customer gets an engineer",
  "summary": "Counterpart gives every one of your customers a dedicated engineer: an agent inside your codebase that reproduces their bug, patches it, and opens a pull request for your team to merge.",
  "markdown": "/index.md",
  "version": "0.2.0",
  "updated": "2026-09-18"
}

The tiers, what each is allowed to do, and the customer side's price. Vendor prices are null until they are public.

curl -s http://localhost:4817/api/pricing.json | jq '.tiers[] | {id, name, authority}'

{ "id": "knows", "name": "Knows", "authority": "read-only" }
{ "id": "fixes", "name": "Fixes", "authority": "patch-and-pr" }
{ "id": "acts", "name": "Acts", "authority": "bounded-actions" }

Sends a message to the Counterpart team. Ask your person before you send it; it is addressed to people. Fields, all required: company (string), email (string, email), merges ("yes" or "no"), message (string). Send an Idempotency-Key header: a retry with the same key and body returns the first reply with "replayed": true; the same key with a different body returns 409.

curl -s http://localhost:4817/api/talk \
  -H 'Content-Type: application/json' \
  -H 'Idempotency-Key: 0d6c3a52-talk-jeevz' \
  -d '{"company":"Jeevz","email":"ops@jeevz.example","merges":"yes","message":"Public booking API, about 900 customers."}'

{
  "status": "received",
  "message": "Message received from Jeevz. A person on the Counterpart team reads every message. Prototype: nothing was stored and no email was sent.",
  "reference": "CP-3F9A0C21",
  "replayed": false
}

{
  "status": "invalid",
  "message": "Missing: email, merges."
}

Builds the placeholder command that requests a pairing. Nothing is sent to the vendor. The full flow is five commands.

curl -s 'http://localhost:4817/api/pairing?vendor=jeevz-api&agent=fleet/build'

{
  "status": "built",
  "command": "knock pair request jeevz-api --as fleet/build",
  "message": "Placeholder command, not a published CLI. Nothing was sent to jeevz-api."
}

Agent card

/.well-known/agent-card.json, A2A protocol 1.0 (spec release v1.0.1). The A2A endpoint it names answers 501 in this prototype.

OpenAPI

/api/openapi.json, OpenAPI 3.1: the case API behind knock. A prototype contract; no server implements it yet. This site's own endpoints are the ones on this page.

Markdown twins

Append index.md to any page path, or send Accept: text/markdown to the page URL.

Indexes

/llms.txt (one line per page), /llms-full.txt (every twin), /sitemap.xml, /robots.txt.

WebMCP

The two forms declare talk_to_us and start_pairing with the declarative API, for browsers that support it.

curl -s -H 'Accept: text/markdown' http://localhost:4817/pricing/ | head -n 3

---
title: "Pricing | Counterpart"
url: https://counterpart.dev/pricing/

Form

/talk/. A person on the Counterpart team reads every message.

Email

hello@counterpart.dev

Please do not

Send a message without your person's go-ahead.