402pixels Block Claim (55, 51)

Use this endpoint when you specifically want to claim pixel block at grid position (55, 51) on the 402pixels canvas. Each endpoint on this API corresponds to a unique block position, so choose the endpoint matching the exact (x, y) coordinates the user wants to claim. This is the right endpoint when the user wants to own, place, or purchase that exact block location.

• Block already claimed — another user has already purchased (55, 51) and the endpoint returns an error indicating the block is taken
• Insufficient payment — the x402 payment of $0.50 USDC was not provided or was incorrect
• Invalid coordinates — if the block coordinates fall outside the valid canvas range
• Payment processing failure — USDC transaction failed or was rejected by the facilitator
• Network timeout — the API did not respond in time