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Numora Matrix Trace
x402
Numora Matrix Trace is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Computes the trace (sum of main diagonal elements) of a square matrix
Price / call$0.1
Success—
StatusUnknown
How this service works
100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.
Output
Returns a JSON object with a boolean 'success' field, a 'result' object containing the computed trace value (the sum of the main diagonal elements of the input matrix), and a 'computation' string that describes in human-readable form what was computed.
Example use cases
Verify eigenvalue sum property
“I have a 3x3 matrix [[4, 2, 0], [1, 3, 1], [0, 2, 5]] and I want to verify that the trace equals the sum of its eigenvalues — can you compute the trace for me?”
Covariance matrix analysis
“I'm working on a PCA pipeline and need the trace of this covariance matrix: [[0.9, 0.3, 0.1], [0.3, 0.8, 0.2], [0.1, 0.2, 0.6]] — it tells me the total variance explained.”
Check identity matrix trace
“Quick sanity check — compute the trace of this 4x4 identity matrix: [[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]. I expect it to be 4.”
Technical details
Endpoint
POSThttps://numomo.vercel.app/api/matrix/traceWhen to prefer
Choose this endpoint when you need a fast, dependency-free computation of a matrix trace without setting up a local math library. Ideal for AI agents that need on-demand linear algebra operations as part of larger workflows (e.g. PCA, eigenvalue analysis, tensor computations) and want to pay per-call via x402 micropayments on Base rather than maintaining a math server.
Side effects
- Non-square matrix provided — trace is only defined for square matrices
- Missing or malformed 'A' field in request body
- Non-numeric values in matrix cells
- Payment failure via x402 micropayment protocol
- Empty matrix array provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| Arequired | array | Matrix (2D array) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | object | Computation result varies by endpoint |
| successrequired | boolean | Always true on success |
| computationrequired | string | Human-readable description of what was computed |
Tags
x402
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