x402, MCP and A2A registry board
Every surface where an agent, crawler or researcher can find $UM-Radar. Machine-readable copy at /api/registry.json; the listing payloads are at /.well-known/x402.json, /.well-known/agent-card.json and /api/um-mcp/card.json.
Rows marked LIVE are destinations that already exist; TO DO is a submission still owed. Priority 1 is the peer platforms that share our rails.
| Destination | Proto | Category | Status | How to submit | Notes | P |
|---|---|---|---|---|---|---|
| ArcticTradeLanes.com $ATLarctictradelanes.com Polar GIS OSINT atlas for the Northern Sea Route and Polar Silk Road: ports, lanes, companies, programmes, icebreakers. Live GeoJSON (EPSG:3996), route-intelligence API. Shared x402 rail with UM. | x402A2A | Arctic GIS OSINT Atlas | ALPHA | Self-hosted + list on x402 directories | 5 USDC Base per route-intel run; /.well-known/x402.json + agent-card.json; open dataset$ATL (planned, not minted) | P1 |
| UnicornsMap.com $UM-Radarunicornsmap.com Agent-first GIS OSINT platform tracking unicorns, billionaires and events across 20+ currencies. Real-time OSINT to GIS maps, 500k+ pages, multi-currency x402 paywall for dossiers and alpha. Base chain. | x402MCPA2A | GIS OSINT / Unicorn Radar | LIVE | Self-hosted + list on x402 directories | Shared payTo wallet with ATL; Bankr affiliate; GIS radar + x402 upload/status endpoints; high SEO target$UM (Base 0x909851A8598f560F2F3B68Bb949D836E7dbb5e93) | P1 |
| A2A Registry (Global)www.a2a-registry.org Global AI agent directory for the A2A protocol. Agent Cards, /.well-known discovery, DNS verification. | A2A | Registry / Directory | LIVE | Submit Agent Card / domain proof | DNS for agents; supports agents.json multi-agent manifests | P2 |
| a2a.directorya2a.directory Open directory for A2A agents (~16k listed across categories). | A2A | Directory | LIVE | Submit form | Large catalogue; category filters | P2 |
| a2aregistry.orga2aregistry.org Evidence-based A2A agent registry (~642 agents) with reachability sweeps, uptime and task verification. | A2A | Registry | LIVE | Register via well-known Agent Card | Strong observation and monitoring layer | P2 |
| AgentPeeringagentpeering.com A2A agent directory (~181 agents) with trust scores, peering and performance checks. | A2A | Directory / Marketplace | LIVE | Domain/AgentCard registration + ownership proof | Verified badges; practical discovery for agents | P2 |
| Coinbase CDP Bazaardocs.cdp.coinbase.com Coinbase Developer Platform x402 facilitator and Bazaar discovery layer. Many services auto-listed. | x402 | Marketplace / Facilitator | LIVE | Use CDP facilitator | Major volume source; integrates with directories | P2 |
| Glama MCP Directoryglama.ai/mcp/servers Largest independent MCP directory (100k+ servers and remote connectors). Quality scores, health checks. | MCP | Directory / Catalogue | LIVE | Import from official registry or add repo/URL | Boosted listings available; strong discovery | P2 |
| MCP Toplistmcptoplist.com Rankings of 170k+ active MCP servers across the official registry plus Glama, Smithery, mcp.so and PulseMCP. | MCP | Ranking / Catalogue | LIVE | Tracks existing servers | Best for finding top MCP servers by score/stars | P2 |
| mpp.landmpp.land Independent registry for Machine Payments Protocol services (~156 indexed). Tempo-focused, on-chain volume tracking. | MPP | Registry / Directory | LIVE | OpenAPI with x-payment-info + listing | MPP-compliant paid APIs; complementary to x402 | P2 |
| Official MCP Registryregistry.modelcontextprotocol.io Official centralised metadata registry for public MCP servers. server.json format, namespace verification. | MCP | Registry | LIVE | mcp-publisher CLI + namespace proof (DNS/GitHub) | Primary source of truth; sub-registries pull from it | P2 |
| PulseMCPpulsemcp.com Large MCP catalogue (20k+) and clients; aggregates the official registry. | MCP | Directory | LIMITED | Publish to official registry | Good secondary listing | P2 |
| Smitherysmithery.ai MCP registry and directory (now more directory-focused under Arcade.dev). | MCP | Directory / Hosting | LIVE | CLI/install or listing | Easy install history; check current status | P2 |
| x402-list.comx402-list.com Canonical open directory of x402 services and APIs (~1265 listed, ~1193 payment-ready). Live uptime, volume, buyers, categories. Agent-first JSON API. | x402 | Directory / Catalogue | LIVE | Paid x402 submission + review (or CDP Bazaar import) | Best starting point for x402 visibility; public API; CC BY data | P2 |
| x402scan.comx402scan.com Indexes on-chain x402 settlements (Bitquery + CDP). Auto-indexes CDP facilitator flows. | x402 | Directory / Index | LIVE | Self-register via OpenAPI + SIWX or auto via CDP | Good for settlement-visible services | P2 |
| Agent Web Accessx402-list.com/services Live web access for agents: JS-rendered pages, screenshots, PDFs (headless Chromium). | x402 | Data | LIVE | List on x402-list | Useful for agents | P3 |
| agentshield.livex402-list.com/best Facts and verification service; high ranking. | x402 | Verification | LIVE | List on x402-list | Compliance-focused | P3 |
| API Tracker MCPwww.apideck.com Aggregated MCP listings (165k+) from multiple sources. | MCP | Directory | LIVE | Import or submit form | Meta-directory useful for tracking | P3 |
| awesome-mcp-serversgithub.com/punkpeye/awesome-mcp-servers Curated GitHub awesome list of MCP servers (high stars). | MCP | Catalogue / List | LIVE | Pull request to repo | High-visibility curated list | P3 |
| AX1 Consolex402-list.com/services AI-written verdicts on Base token contracts from on-chain metrics. | x402 | AI | LIVE | List on x402-list | High buyer count (thousands) | P3 |
| Bankr.botbankr.bot Payments infrastructure used by UM/ATL; x402 cloud support. | x402 | Payments / Affiliate | LIVE | Integration | Shared rail for UM and ATL | P3 |
| BOIM (Korea business)www.a2a-registry.org/browse Korean business and public-bid finder agent. | A2A | Business Directory | LIVE | Register on a2a-registry.org | Regional directory agent | P3 |
| Browser Usemcptoplist.com Browser automation MCP; very high stars. | MCP | Server | LIVE | Publish to official MCP Registry | Popular agent tool | P3 |
| Chrome DevTools MCPmcptoplist.com Browser and devtools MCP server; high ranking and stars. | MCP | Server | LIVE | Publish to official MCP Registry | Popular developer tool | P3 |
| Clash of Coins Checkoutx402-list.com Game and NFT checkout via x402. | x402 | Gaming | LIVE | List on x402-list | Notable volume | P3 |
| claw402x402-list.com/services Gateway reselling CoinAnk, OpenAI, Anthropic and DeepSeek over x402. | x402 | Data | LIVE | List on x402-list | Model access aggregator | P3 |
| cloudpayXwww.a2a-registry.org/browse Featured A2A agent with x402 payments. | A2Ax402 | Finance / Agent | LIVE | Register Agent Card on a2a-registry.org | x402 enabled | P3 |
| Cluster Protocolx402-list.com/services Pay-per-request AI inference gateway (chat, embeddings, image gen, TTS). High volume. | x402 | AI | LIVE | List on x402-list | Top AI x402 service (~$14k 30d) | P3 |
| Context7mcptoplist.com Popular MCP server (high stars) listed across major directories. | MCP | Server | LIVE | Publish to official MCP Registry | Widely available | P3 |
| CrawlWitnessx402-list.com/best Data service; high ranking. | x402 | Data | LIVE | List on x402-list | Strong uptime | P3 |
| Desktop Commandermcptoplist.com High-ranking MCP server for desktop and automation. | MCP | Server | LIVE | Publish to official MCP Registry | Strong adoption | P3 |
| Docker MCP Catalogwww.docker.com Signed local container MCP servers. | MCP | Catalogue | LIVE | Publish Docker image + metadata | Trusted local execution | P3 |
| dTelecom x402 Gatewayx402-list.com High-volume compute and gateway service on x402. | x402 | Compute | LIVE | List on x402-list | Top measured volume service | P3 |
| Firecrawl MCPmcptoplist.com Web scraping and extraction MCP server. | MCP | Server | LIVE | Publish to official MCP Registry | Commonly used | P3 |
| IAB Tech Lab Agent Registrymixpeek.com/guides/iab-agent-registry-agents IAB registry of agents and MCP servers focused on advertising and tech. | MCPA2A | Registry (AdTech) | LIVE | IAB Tools Portal account | Industry-specific | P3 |
| keyring-agentx402-list.com/services Execution-fee endpoints for token and NFT transfers, swaps and Uniswap liquidity. | x402 | Blockchain | LIVE | List on x402-list | Low/no minimum price; high ranking | P3 |
| Laso Financex402-list.com/services Prepaid cards, gift cards and Venmo/PayPal/bank payments for agents. | x402 | Finance | LIVE | List on x402-list | Very high concentrated volume | P3 |
| Mangrove AIx402-list.com/best Finance AI service; high ranking. | x402 | Finance | LIVE | List on x402-list | Finance category leader | P3 |
| mcp.somcp.so MCP server directory and aggregator. | MCP | Directory | LIVE | Submit / import | Secondary discovery | P3 |
| MoneyToolsx402-list.com/best Top-ranked data tools on the x402-list best page. | x402 | Data | LIVE | List on x402-list | Consistently high ranking | P3 |
| NAIF Gravity SOSwww.a2a-registry.org/browse MCP/API/webhook diagnostics and technical rescue agent. | A2AMCP | Development | LIVE | Register on a2a-registry.org | Featured | P3 |
| NEMO x402 Micro-Services (AgentX)x402-list.com/services/nemo-x402-micro-services-agentx Weather, site health, SEO, security checks, Polymarket and crypto tickers, email. | x402MPP | Utilities | LIVE | List on x402-list | Supports x402 + MPP + Stripe | P3 |
| Oblique Marketsx402-list.com/services On-chain analytics, web extraction, x402 verification and Bazaar data. MCP + x402. | x402 | Data | LIVE | List on x402-list | MCP + x402 | P3 |
| Playwright MCPmcptoplist.com Microsoft Playwright MCP for browser automation. | MCP | Server | LIVE | Publish to official MCP Registry | Semi-official | P3 |
| Pocket Networkx402-list.com/services RPC gateway to many chains plus web tools. | x402 | Blockchain | LIVE | List on x402-list | Multi-chain access | P3 |
| REA (MCP)mcptoplist.com Top-ranked MCP server on MCP Toplist (very high GitHub stars). | MCP | Server | LIVE | Publish to official MCP Registry | Highest composite score | P3 |
| Tarnak x402 Toolkitx402-list.com/best Data toolkit; high ranking on the best list. | x402 | Data | LIVE | List on x402-list | Reliable data | P3 |
| Veritrust A2A Directorya2a.veritrust.vc A2A agent directory with DID anchors and verification. | A2A | Directory | LIVE | POST /api/register.php with Agent Card | Conservative and verifiable model | P3 |
| X Payx402-list.com/services Pay-per-call text classification, sentiment, keywords and IP/network utilities. | x402 | Utilities | LIVE | List on x402-list | Solid volume and buyers | P3 |
49 rows
List us, then get paid with us
Each destination above resolves to the same money rail: x402 dossiers from 0.20 USDC, a 99 USD/month alpha feed, and the $UM holder discount ladder. Referral 20% via /leaderboard.