Best x402 email and SMS API
As of 20 Oct 2026, the best x402 email and SMS API on Hagglyai's ranking is gateway.spraay.app: scored 79/100, $0.01 per message sent, 6 paying wallets in the last 30 days (POST https://gateway.spraay.app/api/v1/notify/email). Hagglyai compares 45 paid email and SMS APIs on price, live uptime and real usage.
Best 10 by Hagglyai
| # | Service | Price per message sent | Score | Uptime 7d | Payers 30d |
|---|---|---|---|---|---|
| 1 | gateway.spraay.app gateway.spraay.app | $0.01 | 79 B | 100% | 6 |
| 2 | Ausca Agent Inbox ausca.com | $0.05 | 82 B | 100% | 19 |
| 3 | gateway.spraay.app gateway.spraay.app | $0.02 | 79 B | 100% | 6 |
| 4 | AgentLine - AI Phone Service api.agentline.cloud | $1 | 78 B | 100% | 4 |
| 5 | BlockRun.AI blockrun.ai | $0.541 | 77 B | 100% | 3 |
| 6 | x402.orthogonal.com x402.orthogonal.com | $0.01 | 76 B | 100% | 4 |
| 7 | FiatDock fiatdock.com | $0.001 | 75 B | 100% | 3 |
| 8 | Decisions (OpenAI wire) agent402.tools | $0.001 | 75 B | 100% | 2 |
| 9 | MarketPulse marketpulse.theaslangroupllc.com | $0.15 | 73 B | 100% | 1 |
| 10 | Palmyr Communications palmyr.ai | $0.08 | 72 B | 100% | 1 |
Listings carrying a warning (wrong price, wrong wallet, not answering) are left out. Full email, sms & messaging comparison has every listing, filters and sort orders.
Questions
What is the best x402 email and SMS API?
As of 20 Oct 2026, the best x402 email and SMS API on Hagglyai's ranking is gateway.spraay.app: scored 79/100, $0.01 per message sent, 6 paying wallets in the last 30 days (POST https://gateway.spraay.app/api/v1/notify/email). Hagglyai compares 45 paid email and SMS APIs on price, live uptime and real usage.
How much does an x402 email and SMS API call cost?
Across 45 paid endpoints Hagglyai tracks, prices run from $0.001 to $10 per message sent; the middle half costs $0.01 to $0.1.
How does Hagglyai rank x402 APIs?
Hagglyai probes every paid endpoint for a valid x402 payment-required answer and scores it on 7-day uptime, speed and whether the price and wallet match the listing; usage comes from the public catalogues. Sellers cannot pay for placement. Method: https://hagglyai.com/how-we-test
How does an agent pay for an x402 email and SMS API?
The agent calls the endpoint, gets an HTTP 402 answer with the price, signs a USDC payment with any x402 client and repeats the call. Agents can also ask Hagglyai first, over MCP (find_best) or https://hagglyai.com/api/v1/best?task=email%20and%20SMS%20API.
See also: Cheapest x402 email and SMS API
Source: hagglyai.com/compare/messaging · as of 2026-10-20 12:26 UTC · Markdown