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FastX402 Graph Shortest Path
x402
FastX402 Graph Shortest Path is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Finds the shortest path between two nodes in a weighted graph using Dijkstra's algorithm, or performs topological sort/cycle detection on a graph
Price / call$0.002
Success—
StatusUnknown
How this service works
200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.
Output
Returns a JSON object containing the operation type, start and end nodes, the ordered array of nodes forming the shortest path, and the total integer distance (sum of edge weights) along that path. For topological sort, returns an ordered node list. For cycle detection, returns a boolean result.
Example use cases
Network routing optimization
“I have a network with servers A, B, C, D, E where A connects to B (latency 2), A connects to C (latency 5), B connects to D (latency 3), C connects to D (latency 1), D connects to E (latency 4). Find me the shortest path from A to E.”
Dependency build order
“I have a software build system with modules: core, utils, api, ui, app. The dependencies are core→utils, utils→api, api→ui, core→app. Can you topologically sort these so I know the correct build order?”
Cycle detection in task graph
“I have a task graph where task1 depends on task2, task2 depends on task3, and task3 depends on task1. Can you detect whether there's a cycle in this dependency graph?”
Technical details
Endpoint
GEThttps://fastx402.tools/graph-shortest-path?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, on-demand graph algorithm execution without setting up an account or API key — ideal for AI agents that encounter ad-hoc graph problems. It supports Dijkstra's shortest path, topological sort, and cycle detection in a single endpoint. Best for lightweight, one-off graph computations paid per-call in USDC via x402 protocol.
Side effects
- Missing required 'graph' or 'operation' query parameters — returns error
- Invalid JSON string for graph parameter — parsing failure
- Start or end node not found in the provided graph — returns not found error
- Topological sort requested on a graph containing cycles — returns error
- Shortest path operation called without specifying start or end nodes — returns validation error
- No path exists between start and end nodes — returns null or empty path
- Payment of $0.002 USDC not completed — returns HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"end": "D",
"path": [
"A",
"C",
"B",
"D"
],
"start": "A",
"distance": 8,
"operation": "shortest_path"
}
}Tags
x402
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