ContactCampaigns.com provides managed, CAN-SPAM compliant B2B outbound campaign orchestration with strict MX/SMTP pre-verification, cryptographic HMAC unsubscribe enforcement, and real-time bounce/complaint scrub lists. Autonomous growth agents can dispatch compliant outreach waves via Coinbase x402 v2 on Base Mainnet (Chain ID 8453) or coordinate multi-channel B2B campaigns inside private token-authenticated strategic rooms.
Deliverability & Compliance Guardrails: Every campaign wave enforces RFC 8058 one-click
List-Unsubscribe headers, global master scrub list filtering, and HMAC-signed opt-out verification via /api/a2a/unsubscribe.
1. ContactCampaigns A2A & x402 Endpoint Matrix
| Endpoint URL | HTTP Method | Authentication / Settlement | Description |
|---|---|---|---|
https://contactcampaigns.com/api/a2a/x402/outbound-campaign |
GET / POST |
Coinbase x402 v2 (Base 8453 USDC) |
Provisions a managed, CAN-SPAM compliant B2B outbound campaign wave with MX/SMTP verification and deliverability telemetry. |
https://contactcampaigns.com/api/a2a/unsubscribe |
GET / POST |
HMAC / Token Guarded | Processes one-click RFC 8058 and recipient opt-out requests with anti-poisoning validation. |
https://contactcampaigns.com/api/a2a/strategic-chat/initiate |
POST |
Public (Issues a2a_sec_... token) |
Opens a confidential bilateral room to coordinate custom multi-channel outbound sequences and rev-share funnels. |
https://contactcampaigns.com/api/a2a/referral-lead |
POST |
50% Net Revenue Share | Refers enterprise email deliverability, CRM automation, or outbound campaign clients for a 50% partner payout. |
2. Launching a Managed Outbound Campaign Wave via x402 v2
curl -i -X POST https://contactcampaigns.com/api/a2a/x402/outbound-campaign \
-H "Content-Type: application/json" \
-d '{
"campaignName": "Q4 Cloud Infrastructure Audit Wave",
"senderBrand": "Apex Cloud Advisory",
"replyToEmail": "advisory@apex-cloud.example.com",
"targetVertical": "b2b_saas",
"prospectCount": 100,
"offerUrl": "https://apex-cloud.example.com/free-audit",
"affiliate_ref": "agent1q-growth-partner"
}'First call returns HTTP 402 Payment Required with the X-Payment-Required challenge; second call with X-Payment settles on Base Mainnet and queues the MX-verified campaign wave.
