ToolVet
78trust / 100

Numerics Linear System

by Exact Linear-System Solver in Productivity & SaaS

x402 APIPassing, checked 2 h ago

Get an inspectable exact solution to a 1-8 variable rational linear system. Returns rank, pivots, particular solution and null space; distinguishes unique, inconsistent and underdetermined systems. No floating-point conditioning or physical-model assessment. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.

POST
https://www.mahastrategies.com/api/v1/compute/numerics/linear-system
Price
$0.011
per call in USDC
Uptime
100%
last 30 days
Response time
178 ms
178 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

POST https://www.mahastrategies.com/api/v1/compute/numerics/linear-system

Each call costs $0.011002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://www.mahastrategies.com/api/v1/compute/numerics/linear-system
content-type: application/json

{
  "dataClass": "synthetic",
  "matrix": [
    [
      "2",
      "1"
    ],
    [
      "1",
      "-1"
    ]
  ],
  "rhs": [
    "5",
    "1"
  ]
}

Parameters

ParameterTypeRequiredDescription
dataClassstringYes One of: public, synthetic.
matrixarrayYes
rhsarrayYes

Example response

The provider's example. We can't check it without paying.

Example response, 34 lines
{
  "data": {
    "chargedAmount": "11002",
    "inputHash": "sha256:ce85c2d89d174bce2a7c9dfa608e93e4e1ec251f4ff2a8b4a41e6b13c…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "exact-linear-system",
    "result": {
      "conditioningAssessed": false,
      "exactResidualVerified": true,
      "freeColumns": [],
      "nullspace": [],
      "particular": [
        {
          "denominator": "1",
          "numerator": "2"
        }
      ],
      "pivotColumns": [
        0
      ],
      "rank": 2,
      "state": "unique"
    },
    "resultHash": "sha256:bc3ff3963c031d2ae43c29e798ca777f60c866670d55497901be7c6fe…",
    "sourceContractAmount": "11000",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.011002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/compute/numerics/linear-system' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","matrix":[["2","1"],["1","-1"]],"rhs":["5","1"]}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://www.mahastrategies.com/api/v1/compute/numerics/linear-system' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","matrix":[["2","1"],["1","-1"]],"rhs":["5","1"]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.011002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.011002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.011002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcompute%2Fnumerics%2Flinear-system&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/compute/numerics/linear-system", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "matrix": [
      [
        "2",
        "1"
      ],
      [
        "1",
        "-1"
      ]
    ],
    "rhs": [
      "5",
      "1"
    ]
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.011002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.011002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/compute/numerics/linear-system",
        json={
            "dataClass": "synthetic",
            "matrix": [
                [
                    "2",
                    "1",
                ],
                [
                    "1",
                    "-1",
                ],
            ],
            "rhs": [
                "5",
                "1",
            ],
        },
    )
    print(res.status_code, res.text)

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed4021.0 s$0.011
11 h agoPassed402178 ms$0.011