Cheapest x402 email and SMS API
As of 20 Oct 2026, the cheapest x402 email and SMS API Hagglyai tracks is FiatDock at $0.001 per message sent (POST https://fiatdock.com/v1/email/check), scored 75/100. Hagglyai compares 45 paid email and SMS APIs on price, live uptime and real usage.
Cheapest 10 by Hagglyai
| # | Service | Price per message sent | Score | Uptime 7d | Payers 30d |
|---|---|---|---|---|---|
| 1 | FiatDock fiatdock.com | $0.001 | 75 B | 100% | 3 |
| 2 | Decisions (OpenAI wire) agent402.tools | $0.001 | 75 B | 100% | 2 |
| 3 | win.oneshotagent.com win.oneshotagent.com | $0.001 | 70 B | 100% | 1 |
| 4 | agent402.tools agent402.tools | $0.001 | 70 B | 100% | — |
| 5 | win.oneshotagent.com win.oneshotagent.com | $0.001 | 0 F | 0% | — |
| 6 | agentshelf.syntexa.ch agentshelf.syntexa.ch | $0.001 | unrated | 100% | 1 |
| 7 | agentshelf.syntexa.ch agentshelf.syntexa.ch | $0.001 | unrated | 100% | — |
| 8 | money-reactor.makar52nn2016.workers.dev money-reactor.makar52nn2016.workers.dev | $0.002 | unrated | 100% | 0 |
| 9 | agentrxi.com agentrxi.com | $0.009 | 49 D | 70% | — |
| 10 | gateway.spraay.app gateway.spraay.app | $0.01 | 79 B | 100% | 6 |
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 cheapest x402 email and SMS API?
As of 20 Oct 2026, the cheapest x402 email and SMS API Hagglyai tracks is FiatDock at $0.001 per message sent (POST https://fiatdock.com/v1/email/check), scored 75/100. 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: Best x402 email and SMS API
Source: hagglyai.com/compare/messaging · as of 2026-10-20 12:25 UTC · Markdown