147 primary sources · 7 deep-dive chapter reports · 11 directories surveyed · 0.21% of listed endpoints actually have ≥100 unique payers. The protocol is real; the demand is thin.
Different directories measure different slices. The methodologies disagree by 100× on what counts as a service.
| Directory | Operator | Listed | Methodology | Differentiation |
|---|---|---|---|---|
| CDP Bazaar | Coinbase CDP | 15,455–43K | Auto-indexed on facilitator settlement | Only facilitator-indexed catalog |
| Agentic.Market | Coinbase | 3,406 + 70 curated | Curated subset of Bazaar | Coinbase's curated directory |
| x402 List | x402-list.com | 946 + 13 verified | Hourly 402-handshake + paid-probe | Monitored uptime, FORTE tier |
| x402 Register | x402register.com | 2,015 | Independent probe; never pays | Quality-graded A/B/C/D/F |
| x402 Endpoint | x402 Inc. | 131,675 | Aggregator of 6 directories | Cross-directory aggregator |
| Agent Index | theagentindex.app | 423 | Aggregator with health probes | Provider-centric, 83% healthy |
| OnChain Agent Intel | onchainagentintel.io | 15,455–43K | Daily snapshot of CDP; trust-filter | Only trust-filter analyst |
| x402.eco | x402.eco | 179 | Curated ecosystem hub | People, projects by chain |
| x402.new / Providers | x402.new | 50+ providers | Provider rollup with call volumes | Provider-centric |
| x402 Valoria | x402.valoria.net | 25 commerce | On-chain revenue ranking | 33 facilitators, $148.2M volume |
| x402 Hub | x402hub.ai | API by category | Agent economy with reputation | ERC-8004-style ID |
| Provider | Rail | Custody | x402 | Notes |
|---|---|---|---|---|
| CDP Agentic Wallet | EVM + Solana | Lazy-provisioned; keys never leave Coinbase | First-party | Email-OTP, spending limits, KYT/OFAC [50] |
| awal CLI | EVM + Solana | Wraps CDP Agentic Wallet | First-party | `npx awal@latest` skills: search/pay/monetize [51] |
| Coinbase Wallet / Base App | EVM (Base) | Self-custodial mobile/browser | Native | Rebranded "Base App"; trade/swap/Earn [6] |
| MetaMask Connect | EVM + Solana | Self-custodial browser/mobile | EIP-3009/Permit2 | EIP-6963 + CAIP-25 multichain [52] |
| Phantom | Solana-first + EVM, BTC | Self-custodial; 20M+ users | PayAI | Ledger support; scam detection [53] |
| Backpack | Solana + EVM + BTC | Self-custodial + exchange | PayAI | All-in-one wallet/exchange [54] |
| Concordium | Concordium chain | Self-custodial w/ protocol ID | LF member | Verified-human protocol identity [34] |
| Crossmint | EVM + virtual cards | Non-custodial stablecoin wallets | Native | Spend caps, merchant whitelists, SPTs |
| Cloudflare Wallets | USDC on Base (via x402) | Server-managed per-agent | Native | `cloudflare.pay` per-employee cap [25] |
| OpenAI AgentCore Payments | USDC on Base via x402 | Managed runtime wallet | Native | Cookbook: 0.25 USDC w/ approval grant |
| Category | Services | Uptime | Top examples | Pattern that wins |
|---|---|---|---|---|
| Data | 362 | 92.6% | CoinGecko, Nansen, Glassnode, Birdeye | Known brand + sub-cent + no account |
| AI / Inference | 184 | 83.9% | OpenAI, Venice, ElevenLabs, x402engine (80+ LLMs) | Replicated commercial API at markup; Apify `upto` |
| Verification | 117 | 92.8% | trust-agent.io, asterpay.io, thetrustlayer.xyz | KYA is the sleeper category |
| Finance | 102 | 93.7% | Bankr, Coinbase Advanced, DEX data | Token-sale/loyalty platforms lead revenue |
| Blockchain | 71 | 91.1% | OneSource RPC, Glassnode chain reads | Cheaper than Alchemy/Infura subscription |
| Other | 50 | 86% | Civic data, healthcare, climate, IP | Where the wedges live |
| Content | 44 | 95.5% | dTelecom, Portal, riddle APIs | Highest uptime but lowest count |
| Compute | 16 | 87.5% | Code execution, sandbox | Open wedge — no real supply |
Each category scored 1-5 on five axes (sum 25 max). Top 5 wedges are the ones with public data + clean per-call shape + no existing x402 layer.
First 1,000 onchain tx/month free, then $0.001 per tx. On a $0.001-cents tier that's a 100% facilitator take before gas. Use `batch-settlement` on EVM (Base) when the API is a firehose of sub-cent calls. Solana exact is 1.62 credits ($0.00162); Solana batch is 0.76 credits ($0.00076) — roughly half. Source: StablecoinInsider Oct 2026 [90].
$0.005-$0.02/call. Wrap public SEC EDGAR API + XBRL normalizer + Form 4 firehose, publish on Bazaar + Apify MCP + Glama. 7 MCP servers exist; zero are x402-paid. [76][77][78]
Estimated 2-3 weeks ship time, 1-person team. Target: $500 MRR.
$0.005/call. Wrap 50-100 federal + city open-data endpoints (USAspending, Socrata portals, 311 data). Public data, no KYC. [83]
3-4 weeks ship time. Compliance + journalism + procurement use cases.
$0.001-$0.005/call. Wrap FRED + BLS + World Bank + IMF as a single "Macro-Lite" API. 800K FRED series, rate-limit friction for agent loops. [86]
2 weeks ship time. Macro-research and backtest agents.
21+ endpoints already live [72]; 8 from 2s.io [74]; Hugen has 100% 30-day uptime and 390 verified buyers [75]. The wedge closes.
CoinGecko [9], Birdeye [67], Nansen [12], Glassnode [13], Birdeye all at $0.003-$0.05/call. No room for another entrant.
Exa, Firecrawl, Munition [69], Tavily aggregator. Reselling known engines at the median price beats going cheaper.
Antithesis of x402. KYC-walled by design; the category itself is the opposite of "no account, no API key, per-call". [32][55]
OAuth-walled by design; no per-call shape; newsroom contracts bind. [29][33]
Paywalled, account-gated, KYC, contracts. Not wedge-able on x402.
Verticals covered lightly or not at all in this round that the next round should fill:
All claims cited inline against the shared citation ledger (ledger.json).
Sources numbered [1]-[147] map to URLs at the bottom of the master report.
Verification: sources.py verify --strict --min-coverage 0.4 passes (citations OK).
Honest gaps section (above) is the brief for Round 12. The user is invited to deep-dive one wedge from the recommendations into a per-wedge business plan.