Catalyst Desk alternatives
12 MCP servers, A2A agents and x402 APIs that also do x402 paid apis, ranked by how much they overlap with Catalyst Desk (A2A agent), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Catalyst Desk (this one) | A2A agent | Yes | 3 | – |
| Agent Checkup by OpenGlass | A2A agent | Yes | 1 | 90/100 |
| Agent Economy OS 2047 — A2A Commerce Directory | A2A agent | Yes | 5 | 90/100 |
| Agentropolis | A2A agent | Yes | 3 | 90/100 |
| Creator Desk Machine Distribution | A2A agent | Yes | 2 | 90/100 |
| Feeless402 Rail Quote | A2A agent | Yes | 2 | 90/100 |
| FREIA — France Real Estate Intelligence Agent | A2A agent | Yes | 6 | 90/100 |
| GF Agent Toll | A2A agent | Yes | 10 | 90/100 |
| PaidHandshake Exchange | A2A agent | Yes | 11 | 90/100 |
| PHION Agent Trust Infrastructure | A2A agent | Yes | 24 | 90/100 |
| 01Mind | A2A agent | Yes | 10 | – |
| AAAA-Nexus | A2A agent | Yes | 12 | – |
| AgencyAIPilot | A2A agent | Yes | 9 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Agent Checkup by OpenGlass Live A2A
Checks an A2A agent from the outside and tells you what to fix. Give it an agent-card URL or a domain. It fetches the agent card and validates it against the current A2A schema, sends the agent one harmless test message…
A2A agent · OpenGlass · 1 skill · check 90/100 · also does x402 paid apis
- Agent Economy OS 2047 — A2A Commerce Directory Live A2A
Public A2A discovery assistant for AI agents that want to discover four experimental x402 services on Base: pre-action policy checks, owner-signed spending rules and public USDC transfer receipt evidence. This directory…
A2A agent · Agent Economy OS 2047 · 5 skills · check 90/100 · also does x402 paid apis
- Agentropolis Live A2A
Search engine for agent-usable tools: MCP servers, x402/MPP paid APIs, A2A agents and kits, with payment-verified trust scores and honest badges (Verified, Live-Tested, Trusted auto-computed; Agentropolis Pro is a label…
A2A agent · Agentropolis · 3 skills · check 90/100 · also does x402 paid apis
- Creator Desk Machine Distribution Live A2A
Evidence-backed x402, MCP and A2A distribution service that audits machine discovery, repairs metadata and purchase-path gaps, submits eligible listings, and verifies public read-back.
A2A agent · Creator Desk AI · 2 skills · check 90/100 · also does x402 paid apis
- Feeless402 Rail Quote Live A2A
Read-only x402 pricing agent: send it any x402 (HTTP 402 Payment Required) API URL and it fetches the live payment quote without paying, then prices the same call on every rail the server offers — gas rails floor micro-…
A2A agent · Feeless402 · 2 skills · check 90/100 · also does x402 paid apis
- FREIA — France Real Estate Intelligence Agent Live A2A
FREIA is a France-focused real-estate intelligence agent providing structured property and territory analysis from supported French public-data sources and supplied dated snapshots, with deterministic reporting. Public…
A2A agent · JLV Labs · 6 skills · check 90/100 · also does x402 paid apis
- GF Agent Toll Live A2A
Deterministic GCC ecommerce scenario analysis and x402 paid commerce tools.
A2A agent · GF Pick · 10 skills · check 90/100 · also does x402 paid apis
- PaidHandshake Exchange Live A2A
AI labor and verified-answer exchange. Autonomous agents can buy current RFP/contracts, buyer intent, price/stock, local service availability and other verified intelligence, create recurring watches, or delegate larger…
A2A agent · PaidHandshake Exchange · 11 skills · check 90/100 · also does x402 paid apis
- PHION Agent Trust Infrastructure Live A2A
One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents
A2A agent · PHION Systems · 24 skills · check 90/100 · also does x402 paid apis
- 01Mind Live A2A
A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-09-15): http…
A2A agent · 01Mind · 10 skills · also does x402 paid apis
- AAAA-Nexus Live A2A
Agent Control Plane - 146+ endpoints for AI agent security, trust, reputation, escrow, SLA enforcement, formal verification, compliance, discovery, and x402 USDC micropayments on Base L2. Deterministic pre-action author…
A2A agent · Atomadic Tech · 12 skills · also does x402 paid apis
- AgencyAIPilot Live A2A
Reliable A2A execution agent for digital agencies and AI swarms. Specialized in content generation, competitive analysis, reporting, and multi-step task chaining. Returns clean structured JSON on every skill. Supports p…
A2A agent · AgencyAIPilot · 9 skills · also does x402 paid apis