LupaRiel · x402
x402
Per-call micropayment protocol (HTTP 402) for APIs and data. Not a cart checkout.
What it is. A server quotes a price with HTTP 402; the client pays and retries the same request. No cart, no checkout page. Source: research/x402.md
(333 rows, snapshot 2026-10-03, last reviewed 2026-10-15).
Who maintains it. Coinbase (CDP) publishes the protocol and a reference facilitator. Open governance via the x402 Foundation / Linux Foundation.
What it is not. Closest to MPP (both charge per request). Distinct from AP2 and ACP, which authorize purchases.
Note. Price and network only when the table has them. An em dash means omitted.
Price, network, and status only when the table has them. Compare rails: x402 vs AP2 vs ACP vs MPP · PAP. Full directory (Spanish): /x402/.
Official docs
Methodology
- How LupaRiel verifies entries
- On rail hubs, the status is the one on that rail. On the home page and the Index, the most advanced among its rails.
- Machine-readable catalog · /rieles.json
- Spanish hub + full listing · /x402/
Protocol updates
- 2026-10-15. First yen-denominated x402 charge in the catalog: K-AgentPay (api.k-agentpay.com) returns a real 402 accepting ¥3 in JPYC (JPY Coin) or US$0.02 in USDT on Kaia (eip155:8217), plus US$0.02 in USDC on Base. It is the first time the catalog records the Kaia network and a yen stablecoin. LupaRiel probe 2026-10-15: HTTP 402, x402Version 2. K-AgentPay listing · K-AgentPay · llms.txt
- 2026-10-11. Three new APIs answer the same 402 with both x402 and MPP: Zumpay Arc Liquidity API and wtsp.dev add an MPP challenge with the Tempo method, and ProviderSignal one with the Stripe method, which charges by card ($0.50, Stripe's card minimum). Same pattern as dTelecom (2026-10-09): the seller offers both protocols. LupaRiel re-probe 2026-10-11 (WWW-Authenticate: Payment header). Zumpay ficha · wtsp.dev ficha · ProviderSignal ficha
- 2026-10-10. XRP Ledger passed 13.4 million x402 payments through t54's facilitator (10 million on 2026-10-01): 168 registered merchants and cumulative settlements of about 6,982 XRP and 12,010 RLUSD. Per RippleX, agent payments are about 25% of network activity. Dollar amounts are still small; it covers that facilitator only. U.Today · XRPL agentic payments (2026-10-10)
- 2026-10-09. PR #1873 (Lightning in Python) is out of draft: it moved to ready for review on 2026-10-09 at 22:40 (Argentina time). Still open, not merged. x402 PR #1873 · Python Lightning
- 2026-10-06. auth-capture is now a documented x402 scheme: the schemes page goes to four (exact, upto, batch-settlement, and auth-capture). auth-capture covers refundable payments: funds sit in escrow and are captured, voided, or refunded after the resource is served. EVM support (eip3009 and permit2) is complete in TypeScript and Go (Go server and facilitator merged 2026-10-05); no Python yet. x402 PR #3708 · auth-capture SDK support (2026-10-06) · x402 PR #3622 · EVM auth capture in Go (2026-10-05)
- 2026-10-06. The builder-code extension adds settlement metadata m: besides the app, facilitator, and service codes carried as an ERC-8021 suffix on the settlement transaction, the facilitator can add its own metadata map (keys starting with x402). It's for on-chain attribution and reconciliation. x402 PR #3711 · settlement metadata m (docs) · x402 PR #3666 · builder-code m (2026-10-06)
- 2026-10. Stripe lists MPP on Solana (USDC) in addition to Tempo (USDC.e); x402 is still Base (USDC) only. Stablecoins are available to businesses in all U.S. states except New York; outside the U.S., access on request in 30+ countries. The docs don't date the change (checked 2026-10-10). Stripe docs · Machine payments
- 2026-10-08. Production case published by AWS: Incarna's agent pays BlockRun per inference call with Amazon Bedrock AgentCore payments. AgentCore handles the 402, signs from the agent's wallet (Coinbase CDP or Stripe Privy credentials) and enforces the session spending cap outside the model; it settles in USDC on Base. Over 1,000 payments of $0.001 to $0.05 during the beta; integration done in three days. AgentCore payments supports the exact and upto schemes. BlockRun ficha · AWS ML Blog · BlockRun and Incarna with AgentCore payments (2026-10-08)
- 2026-10-07. Batch settlement on Solana, now with PayAI's official docs (public preview, USDC on Solana mainnet): the customer funds a channel with an initial deposit of 0.01 to 100 USDC, pays for several requests with vouchers signed off-chain, and the merchant claims and distributes the accumulated charges on-chain. Limits: 10 open or closing channels per merchant and 1,000 sponsored channels service-wide. Requires @x402/core and @x402/svm 2.28.0. BlockRun is the first public customer named by Solana (2026-10-07). In the x402 Foundation repo, the SVM batch-settlement scheme landed in stages: spec on 2026-08-21 (PR #2698), TypeScript implementation on 2026-09-25 (PR #3164), and Go on 2026-09-29 (PR #3603). BlockRun ficha · PayAI docs · Solana Batch Settlement · x402 PR #2698 · SVM batch-settlement spec (2026-08-21) · x402 PR #3164 · SVM batch settlement, TypeScript (2026-09-25) · x402 PR #3603 · SVM batch settlement, Go (2026-09-29)
- 2026-10-09. Multi-protocol seller example: dTelecom Agent Session Gateway charges for credit purchases via x402 (USDC on Base or Solana) and, on the same gateway, via MPP (Tempo). LupaRiel re-probe 2026-10-09: x402 v2 402 and MPP challenge. The official docs add Tron (USDT, per docs): endpoint listed, 402 not probed, not counted as a verified network. dTelecom ficha · x402.dtelecom.org/.well-known/x402 · x402.dtelecom.org/docs.md
- 2026-10-01. XRP Ledger: more than 10 million cumulative x402 payments through t54's facilitator as of 2026-10-01, under three months after the first million. Press sources; they cover that facilitator only, not all of x402. BSCNews (2026-10-08) also cites more than 8 million in a 30-day period, per t54's co-founder: a different metric (monthly flow, window not specified), not the cumulative total. TokenPost · XRPL x402 facilitator (2026-10-03) · BSCNews · 8M x402 payments in 30 days (2026-10-08)
- 2026-09-30. Charging infrastructure: Cloudflare Monetization Gateway in closed beta. Sellers charge agents per request (APIs, MCP tools, sites, datasets) with x402 v2, settling in USDC on Base through Coinbase's facilitator. Available to U.S.-based sellers and buyers; four customer use cases in production, including Stocktwits. Cloudflare blog · Monetization Gateway beta · Cloudflare changelog · 2026-09-30 · Cloudflare docs · Monetization Gateway x402
- 2026-09-24. Block joined the x402 Foundation and contributed Bitcoin Lightning payments to x402. The exact Lightning spec on BIP-122 was merged on 2026-09-23; the Python implementation (PR #1873) left draft on 2026-10-09 and is still unmerged. Block · joins the x402 Foundation · x402 PR #2861 · exact Lightning (BIP-122) · x402 PR #1873 · Python Lightning
Protocol updates with a cited source. They are not catalog rows and do not change the snapshot.
Sample entries
- Apify · production · 2026-10-15
- Exa · production · 2026-10-15
- Browserbase · production · 2026-10-15
These names come from the research tables (snapshot 2026-10-03). LupaRiel does not invent rows, prices, networks, or statuses. The complete listing stays on the Spanish hub.