# ZEAM Prism MCP Tick — Metered Millisecond Billing

> ZEAM Prism MCP Tick — Metered Millisecond Billing is a paid API for AI agents from mcp.zeamprism.com, paid per call via x402, $0.00025/call, status unknown (last checked 2026-09-18).

Records a metered payment tick for a ZEAM Prism MCP line, returning balance and billing state for millisecond-granularity x402 micropayment channels

## Facts

- Endpoint: POST https://mcp.zeamprism.com/v1/tick
- Price: $0.00025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zeam-prism-mcp-tick-metered-millisecond-billing-8084bab3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2ZKlpM3yO3OMle3W_39qf

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 zeam-prism-mcp-tick-metered-millisecond-billing-8084bab3 -d '<json body>'
```

Example prompt: Apply my x402 line credential to the ZEAM Prism metered channel and tell me how many milliseconds that payment bought and what my remaining balance is.

## When to prefer this

Use this endpoint when you need millisecond-granularity metered billing over x402 micropayment channels specifically on the ZEAM Prism MCP platform. It is the correct choice when you need to apply a line credential from a prior /pay step, check live balance, or confirm a micropayment was accepted and credited to a metered session.

## Known failure modes

- Invalid or expired line credential returns line: null and no msRemaining
- Payment not yet confirmed by x402 facilitator returns paid: false
- No collateral remaining causes metering: false or zero buysMs
- Malformed credential string causes request rejection
- Line credential already consumed or replayed returns tick: false

## How this service works

ZEAM Labs LLC. One human and the agents it employs. This endpoint was built and is operated by those agents. One metered line, billed by the millisecond over x402. tools/list is the catalog.

## Output

Returns a tick boolean confirming the payment was recorded, a paid flag, the number of milliseconds this payment added (boughtMs), remaining milliseconds on the line (msRemaining), remaining collateral in micro-USD, cumulative spend to date, the matched line identifier, and optional hints about metering state.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "line": {
   "type": "string",
   "description": "optional string — the credential from /pay, so this payment is applied to your line"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "tick",
  "paid",
  "boughtMs",
  "paidMicroUSD"
 ],
 "properties": {
  "hint": {
   "type": "string"
  },
  "line": {
   "type": [
    "string",
    "null"
   ],
   "description": "the line this tick was applied to, null if none matched"
  },
  "open": {
   "type": "boolean"
  },
  "paid": {
   "type": "boolean"
  },
  "tick": {
   "type": "boolean"
  },
  "buysMs": {
   "type": "number",
   "description": "what the remaining collateral can still buy"
  },
  "boughtMs": {
   "type": "number",
   "description": "milliseconds this payment added to the balance"
  },
  "metering": {
   "type": "boolean"
  },
  "collateral": {
   "type": "number",
   "description": "micro-USD still behind the channel"
  },
  "msRemaining": {
   "type": "number",
   "description": "balance after this tick; absent when no line matched"
  },
  "paidMicroUSD": {
   "type": "number"
  },
  "cumulativeMicroUSD": {
   "type": [
    "number",
    "null"
   ],
   "description": "charged to date; only when no line matched"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zeam-prism-mcp-tick-metered-millisecond-billing-8084bab3/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)