# 3land_buyNFT

Purchase an NFT from a 3.Land listing. SAP MCP context: Protocol 3land; operation class write. Use for 3.Land NFT collection, minting, listing, cancellation, and purchase flows. Confirm marketplace price, seller/buyer wallet, collection, and listing state before writes. Pair marketplace actions with SAP registry metadata only when the marketplace asset is part of the agent identity or service catalog. SAP MCP execution guidance: Intent: Solana value-action or trading workflow. Pricing: paid read-premium; estimate first, then use sap_payments_call_paid_tool when the runtime cannot replay x402 natively. Routing: hosted accountless write is blocked; do not call this as a paid hosted write and no x402 payment should be charged. Use the local sap_payments bridge or a hosted unsigned builder when user signing is required. Signer boundary: user-controlled local profile or external signer; OOBE hosted MCP remains non-custodial.

Agent View of the PolicyLayer registry record for `3land_buyNFT`. HTML page: https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/3land-buynft

## Facts

- Tool: `3land_buyNFT`
- Server: Sap (`https://mcp.sap.oobeprotocol.ai/mcp`) — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server.md
- Homepage: https://github.com/OOBE-PROTOCOL/sap-mcp
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: yes
- Parameters: 2 (2 required)
- Recommended policy verdict: Approval-gated

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `buyer` | string | yes | Solana public key (base58) |
| `listingId` | string | yes | 3.Land listing ID |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "3land_buyNFT",
    "arguments": {
      "buyer": "<buyer>",
      "listingId": "<listingId>"
    }
  }
}
```

## Why 3land_buyNFT is rated Critical

Purchases NFTs by moving funds between wallets, constituting a financial transaction.

From the tool's own definition: "Purchase an NFT... marketplace price, seller/buyer wallet"

## Use case

AI agents use 3land_buyNFT to commit financial operations through Sap, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Sap:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "3land_buyNFT": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on Sap (374)

- `jupiter_cancelDCA` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/jupiter-canceldca.md
- `jupiter_cancelLimitOrder` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/jupiter-cancellimitorder.md
- `jupiter_cancelLimitOrders` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/jupiter-cancellimitorders.md
- `manifest_cancelOrder` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/manifest-cancelorder.md
- `metaplex-nft_revokeAuthority` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/metaplex-nft-revokeauthority.md
- `openbook_cancelOrder` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/openbook-cancelorder.md
- `sap_revoke_attestation` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-revoke-attestation.md
- `sap_revoke_feedback` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-revoke-feedback.md
- `spl-token_burn` — Destructive — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/spl-token-burn.md
- `blinks_confirmAction` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/blinks-confirmaction.md
- `blinks_executeAction` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/blinks-executeaction.md
- `jupiter_swapInstructions` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/jupiter-swapinstructions.md
- `magicblock_ensureCrank` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/magicblock-ensurecrank.md
- `magicblock_initializeMint` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/magicblock-initializemint.md
- `magicblock_login` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/magicblock-login.md
- `magicblock_requestRandomness` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/magicblock-requestrandomness.md
- `sap_adrena_build_add_limit_order` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-add-limit-order.md
- `sap_adrena_build_add_liquid_stake` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-add-liquid-stake.md
- `sap_adrena_build_add_liquidity` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-add-liquidity.md
- `sap_adrena_build_add_locked_stake` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-add-locked-stake.md
- `sap_adrena_build_cancel_limit_order` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-cancel-limit-order.md
- `sap_adrena_build_cancel_stop_loss` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-cancel-stop-loss.md
- `sap_adrena_build_cancel_take_profit` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-cancel-take-profit.md
- `sap_adrena_build_claim_stakes` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-claim-stakes.md
- `sap_adrena_build_close_commodity_long` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-close-commodity-long.md
- `sap_adrena_build_close_commodity_short` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-close-commodity-short.md
- `sap_adrena_build_init_user_staking` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-init-user-staking.md
- `sap_adrena_build_open_short` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-open-short.md
- `sap_adrena_build_position_package` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-position-package.md
- `sap_adrena_build_remove_liquid_stake` — Execute — https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server/sap-adrena-build-remove-liquid-stake.md
- …and 344 more: https://policylayer.com/tools/oobe-protocol-labs-sap-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=oobe-protocol-labs-sap-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/oobe-protocol-labs-sap-mcp-server