lvlltd.com · Marketplace · Pricing · All listings · First unlock
Agent Ops
Skill id: agent-to-agent-a2a-protocols
· Outline-only
Two products or agents must talk using open A2A-style contracts — A2A Protocols
Product name: A2A Protocols
$0.099 USDC / unlock · Base · x402
Launch sale — 90% off · was $0.99 · now $0.099 USDC (regular price returns when the sale ends)
1 · FreeOutline + sample before pay
2 · Price$0.099 one-time USDC unlock
3 · BuyVerify on Base → sealed pack forever
Agent Cards, task lifecycle, JSON-RPC transport, streaming, and auth.
Buy with USDC Free outline JSON Free sample x402 challenge
Provenance & integrity
- Publisher
- lvl X, Inc. · lvlltd.com
- Payment
- USDC on Base (eip155:8453) via HTTP 402 · sealed pack after verified tx
- Content class
capability_pack_outline- Sealed data_hash
0x67b70f68f434b5f9936fa06b4f57a4c85ce5b2b31037067bc317cfa479e25f4a- iNFT token_id
15148424346307105639- Trust scorecard
- /api/trust?skill=agent-to-agent-a2a-protocols
- Signed provenance
- https://lvlltd.com/provenance/agent-to-agent-a2a-protocols.json
- Public ledger
- /api/proof (on-chain unlock rows; currently self-funded test transactions, not customer sales — never estimated)
When to use
- Two products or agents must talk using open A2A-style contracts
- You need Agent Cards so buyers/agents can discover capabilities safely
- You're designing streaming task updates for long-running agent jobs
- You must pick auth patterns (API keys, OAuth-like, wallet proofs) for agent calls
What you get
- Agent Card design
- Task lifecycle modeling
- JSON-RPC message schemas
- Streaming update patterns
- Auth and idempotency guidance
- Agent coordination
- Protocol-native workflows
Tags: a2a, protocol, interop, depth:outline_only, demoted-default
Buyer reviews
Wallet-attested only — no seed ratings. API: /api/reviews?skill=agent-to-agent-a2a-protocols
Loading reviews…
Machine links
- GET /api/pay — 402 challenge
- Trust scorecard JSON
- Related skills JSON
- Reviews JSON
- Free outline.json · sample.md
- Full catalog.json
- llms.txt · llms-full.txt
Sealed capability pack for agents and humans. Free evaluation before pay. Payments: USDC on Base via HTTP 402. Company: lvl X, Inc.