Monthly archive
Event dates in this month are historical. zFinia publication dates remain the retrospective dates on each record.
TIER_C · monthly brief · Public record
Official x402 seller documentation drew a bright line: x402.org facilitator for testnets, CDP or PayAI-class facilitators for mainnet. That is an operational standard, not a blog slogan.
Event 28 January 2026 · source 7 September 2026 · zFinia published 7 September 2026 · retrospective
TIER_B · version update · Public record
Official seller documentation instructs developers not to reuse https://x402.org/facilitator on mainnet routes. Production examples include the CDP facilitator at api.cdp.coinbase.com/platform/v2/x402 and facilitator.payai.network. Supported networks listed include Base mainnet eip155:8453 and Solana.
Event 15 January 2026 · source 15 January 2026 · zFinia published 7 September 2026 · retrospective
TIER_B · protocol release · Public record
Official seller documentation lists Base mainnet, Base Sepolia, Solana mainnet and Solana devnet as CAIP-2 identifiers. Foundry’s production policy remains Base USDC receive-only. Editorial coverage must not collapse the protocol to one chain.
Event 15 January 2026 · source 15 January 2026 · zFinia published 7 September 2026 · retrospective
TIER_B · new product · Public record
PayAI’s public site exists alongside its listing in official x402 seller documentation as facilitator.payai.network. That is TIER_B vendor evidence that facilitation is not a Coinbase-only function.
Event 15 January 2026 · source 15 January 2026 · zFinia published 7 September 2026 · retrospective