🏗️ BUILDER BANTER - x402 TAKEOVER 🔔

The Spaces was episode 20 of Builder Banter, an open forum for Web3 builders—especially those working with X4O2 and agentic commerce—to share updates. The host recapped Breakpoint (strong networking, "still early" in agentic commerce), outlined facilitator improvements and X4O2 v2 support, and reiterated a firm disclaimer to DYOR and that stage participation is not endorsement. Relay AI (Alex) showcased usage-based API monetization via X4O2 with auto-generated MCP servers, multi-chain support, and REL buyback mechanics. Solpay Cash announced an AI escrow beta, Visa card plans with privacy safeguards, and upcoming X4O2 facilitator nodes. Engrave (David) shipped a Bitcoin mempool API monetized via X4O2 and MCP tools for BTC assets on Solana. Novosense (Seresha Di Matin) migrated its token to pump.fun and is launching Biolytic.ai. Haya presented homomorphic encryption for agents, cross-chain intent execution via Pi facilitator, middleware for EVM schemes, and advanced analytics. Jars Global (Johan Nathan) is dogfooding Jars Pay and DM Pro with X4O2 payments. Quan.to is building on-chain NFT agents with identity and memory. Crossfund (Himanshu) released a multi-chain swap API and merchant processor powered by X4O2. A Zala-powered holiday card charity campaign closed out the session.

Builder Banter # 20 — Full Recap and Notes

Session format, safety, and tools

• Cadence and format: Builder Banter runs every two weeks (weekly if busy). Speakers get ~5 minutes to introduce themselves, share recent progress, near-term roadmap, and insights.
• Non-endorsement disclaimer (reiterated twice): Being on stage or in the thread is not an endorsement by the host or platform. Listeners should do their own research and due diligence. This followed a recent incident where a project used the platform to build credibility and then rugged after launching a token.
• Q&A: A Stage X chat was set up for anonymous questions. The host monitored and answered one about Relay AI’s architecture.

Host recap: Breakpoint, ecosystem outlook, and roadmap

• Breakpoint highlights: The host just returned from Breakpoint (and significant travel). Strong in‑person networking—met teams from the foundation, early supporters (notably MetaSell), and multiple X4O2/agentic commerce projects. Events were well-organized; overall sentiment was positive.
• Macro takeaway: It’s “still early” for X4O2 and agentic commerce, meaning outsized opportunity today but likely fast-arriving competition. Urging builders to start now and push hard over the next 6–12 months.
• Platform updates:
  • Facilitator improvements underway; v2 rolling out.
  • X4O2 v2 released recently; host will add support this week, along with new schemes and additional integrations.
• Scheduling: Expect the next space on Dec 29; turnout may be lighter due to holidays, but the session will run regardless.

Builder updates and deep dives

Relay AI (Alex – Public Relations; also co-founder/COO at UBI)

• Problem: API monetization is broken—subscription models don’t match usage; builders spend too much time on billing/auth/authz; off‑chain enforcement creates friction and kills experimentation.
• Solution: Usage-based API monetization with X4O2 and the Kai facilitator (payments in-flow on each request). Builders set per-call pricing; no subscriptions, invoices, or off-chain enforcement.
• Live traction:
  • TG Metrics API integrated; users pay per request and pull just the data they need; pricing scales naturally with real usage.
  • Each listed API automatically gets a full MCP server—turning the marketplace into an “agent economy” where agent builders can discover, pay, and execute APIs out of the box.
  • Active BD with well-known products/projects (no early announcements); partnered with dLabs, bringing multiple products/APIs.
  • Multichain support live: Solana, Base, Polygon, Sei. Builders stay on their home chain; users get consolidated access and flow.
• Token model (REL): Utility/fuel token for the platform.
  • A share of usage fees feeds a buyback flywheel (described as “pump fund” in the discussion) to buy REL from the market as usage grows.
  • Current practice is to lock bought-back tokens (team may consider burns later). Host noted locking is often as good as burning while preserving future flexibility.
  • Strategy includes timing buybacks (e.g., buy-the-dip) to support the chart while aligning with real demand.
• Clarification from the host (Stage X Q): Relay monetizes APIs “through APIs,” but Relay itself doesn’t expose a billing API. Instead, Relay uses X4O2 and a proxy that handles the payments layer; providers plug their existing APIs on the other side—no need to build X4O2 logic themselves.
• Chain note: REL token is Solana-only; any other “REL” tokens on other chains are scams.

SoPay / Solpay Cash (Founder; Virginia-based)

• Vision: Become one of the safest crypto payment solutions on Solana—Visa-like user protections, non-custodial-first approach, and strong brand trust.
• AI Escrow (beta): Launching now; ~90% automated with AI plus human oversight for edge cases and fraud handling.
  • Beta testers will be rewarded with SP tokens.
  • Escrow will carry fees; from 2026, fees go to SP buybacks (token deeply embedded in product flows).
• App roadmap: A Cash App–like mobile app is in development.
  • Working with a Visa card distributor; privacy-preserving but not a money-laundering conduit—emphasis on responsible anonymity.
  • Corporate formation and full doxxing underway (US/Virginia compliance focus). Founder is already partially doxxed.
• X4O2 integration: Intentionally waited to see facilitator and ecosystem patterns; now spinning up facilitator nodes and going deeper with the community’s approach (following Pai’s lead).
• Chain scope: Focused on Solana for token and core operations; plans to accept/support payments across other chains in the future.

Engrave Protocol (David)

• Background: 10+ years as a developer; prior EVM projects; pivoted into ordinals and now agentic commerce.
• MVP: A proof‑of‑concept Bitcoin mempool API “layer” accessible via Solana/X4O2.
  • Accepts payments via X4O2, then exposes mempool data to agents/users.
  • Goal is full Mempool API coverage; can scale by running own nodes if needed.
• Next integration: Building MCP tools for “Solv Protocol” (described as issuing 1:1 Bitcoin-backed assets with yield products accessible across chains, including Solana).
  • Aim: Allow AI agents to access BTC liquidity/yield from Solana through MCP.
• Outlook: Will explore agent demos; intends to contribute to X4O2 open source and broader ecosystem growth.

NovoSense (Founder & CEO: Seresha Di Matin; Innovation AB Inc., Sweden)

• Origin story: Personal loss due to undiagnosed T2D spurred focus on medtech/IoT/sensors.
• Backing and traction: Supported by Sony and EU startup ecosystem; ~€2M raised in grants/funding; transitioned from startup to scaling company.
• Token migration: Migrating from previous launch (July) to pump.fun using migrate.fan.
• Product: Biolytic.ai app—AI engine connecting real-time metabolic behaviors with clinical biomarkers (the missing link between wellness tracking and diagnostics).
  • Data inputs: Hydration (initial focus), sleep, stress (via wearables), food intake, medications.
  • Roadmap: Integrating a “Chem 30” panel (lipids and other analytes) in phases for comprehensive multi-parameter analysis.
  • Output: Personalized, actionable guidance (hydration/sleep/stress/food/medication) to achieve performance or wellness goals.
  • Target niches: Women’s wellness, sports tech, general wellness, obesity, keto.
  • Token utility: Tiers for free vs premium plans; token-based benefits.
  • Status: Bug fixes done; beta launch in coming days; gamification on the roadmap.

HAYA (Head of Development; Homomorphic Encryption for Autonomous Agents)

• Core concept: Homomorphic encryption to preserve privacy while AI models compute on encrypted user data.
• Product: “Hash Center,” an agent that processes natural language intents (e.g., “bridge all my SOL to Ethereum”), detects balances, and drafts/sends EVM/SVM transactions.
  • Practicality features: Gas buffers on Solana/Ethereum to prevent failures due to gas misestimation; custodial Telegram bot live; now enabling non-custodial wallet management via their app.
• X4O2 usage: Using the Pai facilitator to enable cross-chain transactions across Polygon, Avalanche, Base, and Solana.
  • Custom middleware: Built a private middleware layer due to limitations of a “permit” standard on the Coinbase facilitator for cross-chain EVM. Their middleware supports signing for $0 USDC to fetch quotes and standardizes cross-chain flows.
  • Aggregation: Multiple liquidity/route sources to avoid fragmentation and insufficiency; improves autonomy by removing chain-specific scheme dependencies.
  • Intent engine: Parses “conclusions” produced by agent planners (e.g., target position, stop-loss) from text and turns them into on-chain transactions.
• Upcoming: Privacy via ARCIUM’s token library (encrypt balances/positions of agent accounts), plus analytics endpoints and advanced wallet analysis (tracking behavior and >500 KOL wallets). All exposed via X4O2 so any agent can consume.

Jars Global (Founder: Johan S. Nathan)

• Founder profile: 21, ex‑Cisco (youngest full-time SWE), exited first company earlier this year. Fully doxxed and livestreaming daily. Runs a startup studio building, growing, and exiting multiple SaaS products with shared resources and heavy dogfooding.
• Jars Pay: Crypto payments layer primarily for the studio’s SaaS portfolio.
  • Accepts any Solana token; will accept JARS; integrates X4O2 via the Pai facilitator.
  • Plan: Roll out this week across products to offer crypto subscriptions/payments.
• DM Pro (dmpro.ai): Automates Twitter/X outreach for B2B lead gen.
  • V2 launching this week with a multi-step sequence builder (like+follow+DM to enter notifications and boost response).
  • Founder uses DM Pro to acquire customers for DM Pro (dogfooding).
  • Exit target mentioned: initially $1.5–2M, though mentors push to think bigger.
• New tool: User feedback product launching on Product Hunt this week (lifetime deal available), paid via Jars Pay. All portfolio products are used across the portfolio to grow/retain.

CrossFund (Blockchain Dev: Himanshu)

• What it is: A multi-chain liquidity aggregator providing best price/fees/time by sourcing routes across multiple aggregators (e.g., LI.FI, Relay) and bridges.
• Global Swap API (live): Embed cross-chain swaps directly into any website/app.
  • Powered by X4O2: No API keys or signups; callers pay per successful call (100 CF tokens per call) via X4O2.
  • Performance: Most cross-chain swaps complete in <10 seconds, except chains like Ethereum where block finality dominates.
  • Mechanics: Aggregates route quotes on source/target chains and bridges assets, executing best-price paths across chains.
• Merchant processor (upcoming): Create invoices payable in any crypto (including volatile meme tokens); funds auto-convert to stables for the merchant. Monetization/payments also via X4O2.
• Milestone: Graduated their pool during Breakpoint weekend; progressing well.

Zala x MeanPutter greeting cards (Speaker)

• Post‑Thanksgiving results: The X4O2 integration with MeanPutter worked smoothly; new feature allows selecting a different receiving wallet for payments.
• Holiday use case: Launching Christmas greeting cards where buyers can send a personalized card “wrapped” with a small amount of SOL that gets routed to a charity (benefits from the new receiving wallet feature).
• Creative: Using Zala for the graphics; open to collaborations for holiday campaigns.

Notable themes and patterns

• It’s early for agentic commerce: Builders see real usage coming online quickly. Expect rapid competition; execution speed matters.
• X4O2 as common rails: Many builders are standardizing around X4O2 to unify in-flow payments across APIs, agents, swaps, and merchant invoicing without traditional API keys.
• Agent-readiness: Relay AI’s automatic MCP servers and HAYA’s intent engine show a trend of making APIs/analytics “agent-native,” discoverable, and executable with payments baked in.
• Cross‑chain UX and autonomy: HAYA and CrossFund are tackling cross-chain complexity with aggregators/middleware to reduce chain-specific coupling and fragility.
• Trust and compliance: In response to rugs and payment risk, teams like SoPay are institutionalizing (corp, doxxing, Visa rails, US compliance) while staying privacy-conscious.

Key highlights and timelines

• Host/platform: Facilitator improvements and X4O2 v2 support landing this week; more schemes coming.
• Relay AI: TG Metrics API live; MCP servers for all APIs; multichain (Solana, Base, Polygon, Sei); buyback-and-lock token flywheel in motion.
• SoPay: AI escrow beta live now; Visa-card partnership in progress; X4O2 facilitator nodes planned; SP buybacks from escrow fees beginning 2026.
• Engrave: Bitcoin mempool API via Solana/X4O2; MCP tools for Solv Protocol BTC assets next.
• NovoSense: Biolytic.ai beta in days; pump.fun migration underway; gamification upcoming.
• HAYA: Non-custodial app live; cross-chain via Pai facilitator; middleware for EVM; ARCIUM privacy and analytics endpoints planned.
• Jars Global: Jars Pay + X4O2 payments rolling out this week; DM Pro V2 this week; feedback tool launching on Product Hunt.
• CrossFund: Global Swap API live (pay-per-call via X4O2); merchant processor next.
• Zala/MeanPutter: Holiday charity cards (SOL routed to charities) launching now.

Administrative

• Next session: Targeting Dec 29. Attendance may vary due to holidays; session will run even if shorter.
• Standing reminder: Stage presence ≠ endorsement. Do your own research; beware of scams and impostor tokens (e.g., Relay’s token is Solana-only).