API & MCP

REST

GET https://memo.dropwatchhq.com/api/opportunities?naics=336212        # free SAM.gov firehose
GET https://memo.dropwatchhq.com/api/memo?opp=<opportunityId>            # memo (free preview / x402 full)

MCP (streamable-http)

POST https://memo.dropwatchhq.com/mcp
{"jsonrpc":"2.0","id":1,"method":"tools/call",
 "params":{"name":"list_opportunities","arguments":{"naics":"336212"}}}

{"jsonrpc":"2.0","id":2,"method":"tools/call",
 "params":{"name":"generate_govcon_memo","arguments":{"opp":"<opportunityId>"}}}

Tools: generate_govcon_memo (premium, x402 $0.50 USDC/Base), list_opportunities (free), memo_preview (free). Discovery: /.well-known/x402, /llms.txt.

Data sources (all keyless)

SAM.gov contract-opportunity search + detail · USAspending.gov spending_by_award (incumbent field) · contradiction-engine (10-K-vs-federal dual-cited records). The named SAM Interested-Vendors-List is auth-gated and not required for the memo.