# Truth Bear Maritime Chokepoint Passage Chain Gauge

> Truth Bear Maritime Chokepoint Passage Chain Gauge is a paid API for AI agents from aeml-x402.zeabur.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns a 3-leg sequential chain reading for a maritime chokepoint (Hormuz, Suez, Panama, Malacca, etc.) covering sea state vs. operating thresholds, anchorage congestion, and realized daily transits from IMF PortWatch.

## Facts

- Endpoint: GET https://aeml-x402.zeabur.app/gauge/chokepoint-region
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/truth-bear-maritime-chokepoint-passage-chain-gauge-3df5825d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z6aQ8ML0RNX-APsUcJOpC

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 truth-bear-maritime-chokepoint-passage-chain-gauge-3df5825d
```

Example prompt: Pull the current 3-leg chokepoint chain for the Strait of Hormuz — I want to see sea state vs. operating thresholds, anchorage congestion, and realized daily transit count, and how many legs are confirmed.

## When to prefer this

Choose this endpoint when you need a structured, multi-signal sequential chain for a specific maritime chokepoint combining sea state, congestion, and actual transit throughput in one call. Prefer it over general shipping news or AIS trackers when you want sourced, hash-verified observational data with explicit confidence scoring and provenance trails. Best for supply chain risk monitoring, logistics planning research, or geopolitical trade flow analysis at named chokepoints.

## Known failure modes

- 422 no_charge returned when any required data source is unavailable — no billing occurs
- Partial legs lit: confidence is reduced if one or more legs return no data
- Stale data flagged via freshness field (fresh/recent/stale) in provenance
- Unknown or unsupported chokepoint code in ?loc= parameter may return error or empty legs
- Source outages at IMF PortWatch, NOAA, or Open-Meteo can degrade chain completeness

## How this service works

[3-LEG] Maritime chokepoint passage chain, one chokepoint (?loc=hormuz, suez, panama, malacca and more): leading sea state against operating thresholds -> current anchorage congestion, vessels waiting -> realized realized daily transits from IMF PortWatch (confirmation gate). A sequential chain, not one reading - confidence = how many legs are lit, in order. Sources: IMF PortWatch, NOAA, Open-Meteo. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.

## Output

A structured JSON object with a 'legs' field containing keyed readings for each chain leg (sea state, anchorage congestion, realized transits), each with current value, observed_at timestamp, data age in hours, and a record hash. Also includes a cross_line_narrative (descriptive, no forecast), provenance with freshness status, an optional citation block with Ed25519 signature for zero-trust verification, grade/scope disclaimers, and a confidence indicator based on how many legs returned data in order. Returns 422 with no charge if data is unavailable.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "loc"
     ],
     "properties": {
      "loc": {
       "type": "string",
       "examples": [
        "suez-redsea",
        "panama-pacific",
        "malacca",
        "hormuz",
        "goodhope",
        "channel"
       ],
       "description": "required - location id; full list at free /gauge/preview",
       "x-accepted-values": {
        "all": "https://api.truthbear.co/schemas/gauge-chokepoint-region.input.json",
        "shown": 6,
        "total": 12
       }
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/truth-bear-maritime-chokepoint-passage-chain-gauge-3df5825d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aeml-x402.zeabur.app](https://www.zero.xyz/host/aeml-x402.zeabur.app/llms.txt)