skill-market
x402 skill catalog on lvlltd.com — search, quote, pay with Base USDC, unlock sealed packs.
Community: Submitted by a user or imported; check the owner before granting accessOnlineNo sign-inGlobalFreeRead-only
What it can do
What data it sees
Do you need an account
No: the server works without sign-in
x402 skill catalog on lvlltd.com — search, quote, pay with Base USDC, unlock sealed packs.
How to connect
How to connect skill-market to Claude
The server address to paste into Claude settings:
https://lvlltd.com/api/mcp
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect skill-market to ChatGPT
The server address to paste into ChatGPT settings:
https://lvlltd.com/api/mcp
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect skill-market to Cursor
The server address to paste into Cursor settings:
https://lvlltd.com/api/mcp
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (59)
Raw names from tools/list. Only developers need these.
| search_skills | Search lvlltd.com x402 skill catalog. Free. Returns price + free_eval URLs. |
| get_skill_details | Public skill details + outline/sample/challenge links. Free. |
| get_payment_challenge | Live x402 402 challenge for a skill. Does not unlock. Pay then purchase_skill. |
| quote_price | Alias of get_payment_challenge — live x402 quote (amount, payTo, asset). Free. Full catalog. |
| list_all_skills | Paginated full catalog listing (all public skills from catalog.json — not a subset). Free. |
| purchase_skill | Without tx_hash: 402 + unsigned wallet_next_action (EIP-3009 PAYMENT-SIGNATURE template; no keys). With tx_hash or payment_signature: POST unlock via /api/pay (no payment bypass). |
| verify_skill | Alias of verify_unlock — check public /api/proof ledger for confirmed unlocks (never invents volume). |
| install | Alias of install_skill_payload — after purchase write sealed files + SKILL.md paths. Requires tx_hash. |
| get_commerce_signals | Rank skills by confirmed unlock demand. Free. |
| lookup_agent_identity | ERC-8004 / local identity lookup for a wallet. Additive — not required to buy. |
| quote_skill | Alias of quote_price / get_payment_challenge — live x402 quote. Free. |
| verify_unlock | Check public /api/proof ledger for confirmed unlocks (never invents volume). |
| get_security_scan | Published security scan for a skill (real findings or clean-with-honesty). Free. |
| get_eval_score | Public eval suite pass rate if suite exists. Free. |
| install_skill_payload | After purchase: sealed files + SKILL.md install paths. Requires tx_hash (routes through /api/pay). |
| intent_search | Natural-language goal → ranked skills/stacks (semantic TF-IDF). Free. |
| list_recurring_plans | List catalog live / update / bundle-renew / metered plans. One-time unlocks remain separate and perpetual. Free. |
| check_access | Resolve skill access: one_time_unlock (perpetual) > catalog_sub > bundle_renew > meter. Never confuses live access with sealed ownership. |
| subscribe_plan | Without tx_hash: 402 challenge for a plan. With tx_hash: start/renew. Cancel: action=cancel (one step). Never revokes one-time unlocks. |
| a2a_discover | A2A bridge: fetch the marketplace Agent Card (/.well-known/agent-card.json). Free. Use before a2a_message_send. |
| a2a_message_send | A2A bridge: send message/send to the LVL A2A agent. Supports multi-turn via task_id+context_id. Does not settle payment — use purchase_skill / x402 for money. |
| a2a_tasks_get | A2A bridge: tasks/get — poll stored multi-turn task by id. |
| a2a_tasks_cancel | A2A bridge: tasks/cancel — cancel an in-flight multi-turn task. |
| a2a_bridge_info | A2A↔MCP bridge topology for LVL: when to use A2A vs MCP vs x402. Free. |
| meter_budget | Get or set spend cap; or quote metered per-call x402 for a skill. Caps prevent runaway agent spend. |
| esp_discover | ESP protocol root (Evaluate → Settle → Prove). Free. Philosophy + endpoints + canary. Prefer before settling any skill. |
| esp_cycle | Full ESP cycle for a skill: free evaluate endpoints, atomic settle challenge, public prove stats (ledger-only quality). Free to call. |
| esp_evaluate | ESP Evaluate phase only — free outline/sample/canary links. Never requires payment. Settle only after this. |
| sco_discover | SCO protocol root (Sealed Consensus Oracles). Free. Philosophy, foundation oracles, agent sequence. Prefer before oracle settlement. |
| sco_eval | SCO free evaluation for an oracle: outline, free samples, ledger-only reputation. Never requires payment. |
| sco_canary | Parallel multi-provider canary: seal challengeable packs from independent oracle providers. |
| sco_consensus | Critic/consensus oracle: aggregate sealed pack cids into a higher-confidence sealed consensus pack. |
| sco_challenge | File or resolve an economic challenge against a sealed SCO pack. Reputation updates from ledger only. |
| sco_reputation | Ledger-derived oracle reputation only (accuracy, freshness, challenge_survival, selection_rate, economic_weight). Null when no evidence. |
| list_judges | Recursive evaluator market — judge/verifier/critic ESP skills. Quality from public proof ledger only. Free. |
| post_intent | Post a root problem/intent with success_criteria and optional bounty_usd (P1). Free to post. Settlement still x402; success only via /api/proof. |
| get_ready | Truthful readiness probe (/api/ready). ready:true only when payment+catalog rails work. |
| get_proof | Public confirmed-only unlock ledger. Never invents volume. Optional skill_id filter. |
| get_fleet | Fleet map: skills, open-market, music, swarm, studio bridges. Free. |
| get_sandbox | Sandbox/execution patterns for purchased packs. Optional skill_id for per-skill resources + packaging maturity. |
| get_networks | Multi-chain + multi-asset + gas rails. Base live; other chains planned. Sponsored canary honesty. |
| get_escrow_meta | Open-market multi-party escrow (NOT skill payTo). LVLEscrow held-fund contract metadata. |
| get_capability_info | Short-lived capability token discovery (P1). Not an API key for purchase. |
| get_pack_meta | Public sealed pack metadata + sealed_pack_hash (no paywall contents). |
| paid_api_call | Metered x402 API call (nothing over $5). Without tx_hash: 402 quote. With tx_hash: records the paid call. Discovery tools stay free. New billable APIs must go through this tool. |
| receipt_verify | Verify a lvl-decision-receipt-v1 integrity hash. Returns match + recomputed hash. Free. |
| receipt_mint | Mint a DecisionReceipt for an agent-side decision (same schema as access/pay). Free. |
| memory_remember | Store a key/value in agent KV memory (namespace optional, TTL default 24h). |
| memory_recall | Recall a value from agent KV memory by key (+ optional namespace). |
| memory_list | List keys in a memory namespace (prefix list when KV supports it). |
| memory_forget | Delete a key from agent KV memory. |
| long_running_start | Start a long-running / background task (KV queue stub). Returns task_id for status/cancel. |
| long_running_status | Get status of a long-running task by task_id. |
| long_running_cancel | Cancel a long-running task by task_id. |
| event_register | Register interest in a topic (stub event bus). Returns event_id. |
| event_list | List active event registrations for a topic. |
| event_trigger | Trigger an event on a topic with optional payload (records + surfaces registrations). |
| bankr_rails | Bankr x402 Cloud rail for LVL skills (catalog/unlock/canary URLs + payTo). Does not unlock. Canonical settlement remains /api/pay. Free. |
| bankr_quote | Bankr unlock URL + LVL 402 challenge URL for a skill_id. Does not pay or unlock. Free. |