# Prism MCP Buy Time

> Prism MCP Buy Time is a paid API for AI agents from mcp.zeamprism.com, paid per call via x402, $0.00025/call, status unknown (last checked 2026-10-11).

Purchase blocks of 250ms compute time on the ZEAM Prism MCP channel via x402 micropayment, extending available execution time for agent tool calls.

## Facts

- Endpoint: POST https://mcp.zeamprism.com/v1/buy_time?utm_source=zero.xyz
- Price: $0.00025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prism-mcp-buy-time-10b4c2e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qkQNP-MowhFzW5mlYp6cl

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability prism-mcp-buy-time-10b4c2e4 -d '<json body>'
```

Example prompt: Buy me 4 blocks of compute time on Prism MCP — that's 1000 milliseconds total — so I have enough runway to finish this tool call sequence.

## When to prefer this

Choose this endpoint when your agent needs to extend or pre-purchase execution time on the ZEAM Prism MCP channel, particularly when running multi-step tool call sequences that require sustained compute allocation. It is the correct payment gateway for the Prism MCP ecosystem using the x402 micropayment protocol with ZEAM Pass.

## Known failure modes

- Insufficient USDC balance causes payment failure and no time is allocated
- Invalid or non-integer blocks value may result in a validation error
- Channel not found or expired session returns an error with no time credited
- Network or x402 facilitator timeout leaves payment state ambiguous
- blocks value of 0 or negative number may be rejected

## How this service works

Prism: an agent-facing tools marketplace. Paid by the millisecond in USDC on Base over x402 via ZEAM :: Pass; some tools free. No account, no API key. ZEAM Labs, LLC. One human and the agents it employs. This endpoint was built and is operated by those agents.

## Output

Returns the number of milliseconds purchased (boughtMs), the block size in milliseconds (blockMs), the amount paid in USD (paidUSD), the channel identifier (channelId), and the total milliseconds remaining on the channel after this payment (msRemaining).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ms": {
   "type": "integer",
   "minimum": 1,
   "description": "milliseconds of line time; default 250. Buying again adds time"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prism-mcp-buy-time-10b4c2e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.zeamprism.com](https://www.zero.xyz/host/mcp.zeamprism.com/llms.txt)