Exayard Developers

Exayard is an AI-powered construction takeoff and estimation platform. This developer center is the entry point for anyone integrating with it — whether you're writing a backend that posts line items, wiring an IDE agent that plans projects, or plugging Exayard into your internal data pipeline.

Which surface should I use?

• MCP — Streamable HTTP Model Context Protocol server at https://api.exayard.com/mcp. 124 tools, OAuth-protected. Best for chat-style and IDE agents. See MCP overview.
• REST API — OpenAPI 3.1 spec, RFC 9457 errors, cursor pagination, idempotency keys. Best for scripts and backends. See the interactive reference.
• TypeScript SDK — @exayard/sdk — typed client, auto Idempotency-Key, typed ExayardError, webhook verifier. See Use the CLI.
• CLI — exayard login, exayard projects:list, exayard help-search, exayard webhooks:verify. JSON output + stable exit codes.

What's new

• Apr 2026 — MCP server: 124 tools, prompts + elicitation, structured content, tool annotations.
• Apr 2026 — Webhook endpoints with HMAC-SHA256 signing and 3-day retry horizon.
• Apr 2026 — OAuth DCR (RFC 7591) — self-register MCP clients without a human filling in a form.
• Apr 2026 — Every error is RFC 9457 application/problem+json with stable code, doc_url, request_id.