75trust / 100

Micro Retrieval Recovery Regression

by Retrieval recovery regression in AI models & inference

x402 APIPassing, checked 40 min ago

Compare complete, partial, and missed evidence recovery on one matched, hash-frozen cohort of up to 64 questions and papers. Report paired transitions and a caller-declared complete-recovery drop threshold. Descriptive evidence-ID overlap, not answer quality or causal inference.

POST

https://www.mahastrategies.com/api/v1/micro/retrieval-recovery-regression

Price: $0.074; per call in USDC
Uptime: 100%; last 30 days
Response time: 420 ms; 641 ms slowest 5%
Last check: Passed; 40 min ago, next any minute now

Run a free test call How to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://www.mahastrategies.com/api/v1/micro/retrieval-recovery-regression

Each call costs $0.074 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/micro/retrieval-recovery-regression
content-type: application/json

{
  "baseline": {
    "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
    "observations": [
      {
        "paperId": "paper-a",
        "questionId": "q1",
        "retrievedEvidenceIds": [
          "a1"
        ]
      },
      {
        "paperId": "paper-b",
        "questionId": "q2",
        "retrievedEvidenceIds": [
          "b1"
        ]
      }
    ],
    "runId": "baseline"
  },
  "candidate": {
    "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
    "observations": [
      {
        "paperId": "paper-a",
        "questionId": "q1",
        "retrievedEvidenceIds": [
          "a1",
          "a2"
        ]
      },
      {
        "paperId": "paper-b",
        "questionId": "q2",
        "retrievedEvidenceIds": []
      }
    ],
    "runId": "candidate"
  },
  "corpusHash": "sha256:5e1bf4f25cdc1fc0fbcbb2240affabbd808fd2ba8fa1ce0b6723dac5dc682759",
  "dataClass": "synthetic",
  "evidence": [
    {
      "evidenceId": "a1",
      "paperId": "paper-a"
    },
    {
      "evidenceId": "a2",
      "paperId": "paper-a"
    },
    {
      "evidenceId": "b1",
      "paperId": "paper-b"
    }
  ],
  "maxCompleteDropBps": 0,
  "paperIds": [
    "paper-a",
    "paper-b"
  ],
  "questions": [
    {
      "expectedEvidenceIds": [
        "a1",
        "a2"
      ],
      "paperId": "paper-a",
      "questionId": "q1"
    },
    {
      "expectedEvidenceIds": [
        "b1"
      ],
      "paperId": "paper-b",
      "questionId": "q2"
    }
  ]
}

Parameters

Parameter	Type	Required	Description
`baseline`	object	Yes
`candidate`	object	Yes
`corpusHash`	string	Yes
`dataClass`	string	Yes	One of: public, synthetic.
`evidence`	array	Yes
`maxCompleteDropBps`	integer	Yes
`paperIds`	array	Yes
`questions`	array	Yes

Example response

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

Example response, 72 lines

{
  "amountBaseUnits": "74000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:9d22eb8f9fd0df5d9672e8b177d134dd6a99bfc7ae6ad1cc1b73750e6…",
  "offerId": "retrieval-recovery-regression",
  "receiptDigest": "sha256:7ad155f100f5edb50a0919474d844a9a72cae35b0d64afd136ac93607…",
  "result": {
    "baselineCompleteBps": 5000,
    "baselineCounts": {
      "complete": 1,
      "miss": 0,
      "partial": 1
    },
    "baselineRunId": "baseline",
    "candidateCompleteBps": 5000,
    "candidateCounts": {
      "complete": 1,
      "miss": 1,
      "partial": 0
    },
    "candidateRunId": "candidate",
    "completeDeltaBps": 0,
    "dataClass": "synthetic",
    "frozenCohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3…",
    "improved": 1,
    "inputSha256": "sha256:9d22eb8f9fd0df5d9672e8b177d134dd6a99bfc7ae6ad1cc1b73750e6…",
    "limits": [
      "Public/synthetic is a caller declaration, not content inspection…"
    ],
    "matchedPaperIds": [
      "paper-a",
      "paper-b"
    ],
    "maxCompleteDropBps": 0,
    "papers": [
      {
        "baselineComplete": 0,
        "candidateComplete": 1,
        "completeDeltaBps": 10000,
        "paperId": "paper-a",
        "questionCount": 1
      }
    ],
    "questionCount": 2,
    "questions": [
      {
        "baselineRecovered": 1,
        "baselineState": "partial",
        "candidateRecovered": 2,
        "candidateState": "complete",
        "paperId": "paper-a",
        "questionId": "q1",
        "requiredCount": 2
      }
    ],
    "regressed": 1,
    "regressionObserved": false,
    "resultSha256": "sha256:86aad75a7fb866a83e687aeb1dee304c7a67e4a31f8cac9c28a9fd803…",
    "sourcesVerified": false,
    "transitions": [
      {
        "count": 0,
        "from": "complete",
        "to": "complete"
      }
    ],
    "unchanged": 0
  },
  "version": "maha-microproducts/0.1"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.074.

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/micro/retrieval-recovery-regression' \
  -H 'content-type: application/json' \
  --data-raw '{"baseline":{"cohortSha256":"sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2","observations":[{"paperId":"paper-a","questionId":"q1","retrievedEvidenceIds":["a1"]},{"paperId":"paper-b","questionId":"q2","retrievedEvidenceIds":["b1"]}],"runId":"baseline"},"candidate":{"cohortSha256":"sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2","observations":[{"paperId":"paper-a","questionId":"q1","retrievedEvidenceIds":["a1","a2"]},{"paperId":"paper-b","questionId":"q2","retrievedEvidenceIds":[]}],"runId":"candidate"},"corpusHash":"sha256:5e1bf4f25cdc1fc0fbcbb2240affabbd808fd2ba8fa1ce0b6723dac5dc682759","dataClass":"synthetic","evidence":[{"evidenceId":"a1","paperId":"paper-a"},{"evidenceId":"a2","paperId":"paper-a"},{"evidenceId":"b1","paperId":"paper-b"}],"maxCompleteDropBps":0,"paperIds":["paper-a","paper-b"],"questions":[{"expectedEvidenceIds":["a1","a2"],"paperId":"paper-a","questionId":"q1"},{"expectedEvidenceIds":["b1"],"paperId":"paper-b","questionId":"q2"}]}'

# 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/micro/retrieval-recovery-regression' \
  -H 'content-type: application/json' \
  --data-raw '{"baseline":{"cohortSha256":"sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2","observations":[{"paperId":"paper-a","questionId":"q1","retrievedEvidenceIds":["a1"]},{"paperId":"paper-b","questionId":"q2","retrievedEvidenceIds":["b1"]}],"runId":"baseline"},"candidate":{"cohortSha256":"sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2","observations":[{"paperId":"paper-a","questionId":"q1","retrievedEvidenceIds":["a1","a2"]},{"paperId":"paper-b","questionId":"q2","retrievedEvidenceIds":[]}],"runId":"candidate"},"corpusHash":"sha256:5e1bf4f25cdc1fc0fbcbb2240affabbd808fd2ba8fa1ce0b6723dac5dc682759","dataClass":"synthetic","evidence":[{"evidenceId":"a1","paperId":"paper-a"},{"evidenceId":"a2","paperId":"paper-a"},{"evidenceId":"b1","paperId":"paper-b"}],"maxCompleteDropBps":0,"paperIds":["paper-a","paper-b"],"questions":[{"expectedEvidenceIds":["a1","a2"],"paperId":"paper-a","questionId":"q1"},{"expectedEvidenceIds":["b1"],"paperId":"paper-b","questionId":"q2"}]}' \
  | 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 $0.074 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.074" });
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 $0.074 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fretrieval-recovery-regression&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/retrieval-recovery-regression", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "baseline": {
      "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
      "observations": [
        {
          "paperId": "paper-a",
          "questionId": "q1",
          "retrievedEvidenceIds": [
            "a1"
          ]
        },
        {
          "paperId": "paper-b",
          "questionId": "q2",
          "retrievedEvidenceIds": [
            "b1"
          ]
        }
      ],
      "runId": "baseline"
    },
    "candidate": {
      "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
      "observations": [
        {
          "paperId": "paper-a",
          "questionId": "q1",
          "retrievedEvidenceIds": [
            "a1",
            "a2"
          ]
        },
        {
          "paperId": "paper-b",
          "questionId": "q2",
          "retrievedEvidenceIds": []
        }
      ],
      "runId": "candidate"
    },
    "corpusHash": "sha256:5e1bf4f25cdc1fc0fbcbb2240affabbd808fd2ba8fa1ce0b6723dac5dc682759",
    "dataClass": "synthetic",
    "evidence": [
      {
        "evidenceId": "a1",
        "paperId": "paper-a"
      },
      {
        "evidenceId": "a2",
        "paperId": "paper-a"
      },
      {
        "evidenceId": "b1",
        "paperId": "paper-b"
      }
    ],
    "maxCompleteDropBps": 0,
    "paperIds": [
      "paper-a",
      "paper-b"
    ],
    "questions": [
      {
        "expectedEvidenceIds": [
          "a1",
          "a2"
        ],
        "paperId": "paper-a",
        "questionId": "q1"
      },
      {
        "expectedEvidenceIds": [
          "b1"
        ],
        "paperId": "paper-b",
        "questionId": "q2"
      }
    ]
  }),
});
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 $0.074 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.074"})
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/micro/retrieval-recovery-regression",
        json={
            "baseline": {
                "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
                "observations": [
                    {
                        "paperId": "paper-a",
                        "questionId": "q1",
                        "retrievedEvidenceIds": [
                            "a1",
                        ],
                    },
                    {
                        "paperId": "paper-b",
                        "questionId": "q2",
                        "retrievedEvidenceIds": [
                            "b1",
                        ],
                    },
                ],
                "runId": "baseline",
            },
            "candidate": {
                "cohortSha256": "sha256:874ebcbb47229979ed9499f3733e3f483b970ceb0b0c1f9bc52c734f3176d8f2",
                "observations": [
                    {
                        "paperId": "paper-a",
                        "questionId": "q1",
                        "retrievedEvidenceIds": [
                            "a1",
                            "a2",
                        ],
                    },
                    {
                        "paperId": "paper-b",
                        "questionId": "q2",
                        "retrievedEvidenceIds": [],
                    },
                ],
                "runId": "candidate",
            },
            "corpusHash": "sha256:5e1bf4f25cdc1fc0fbcbb2240affabbd808fd2ba8fa1ce0b6723dac5dc682759",
            "dataClass": "synthetic",
            "evidence": [
                {
                    "evidenceId": "a1",
                    "paperId": "paper-a",
                },
                {
                    "evidenceId": "a2",
                    "paperId": "paper-a",
                },
                {
                    "evidenceId": "b1",
                    "paperId": "paper-b",
                },
            ],
            "maxCompleteDropBps": 0,
            "paperIds": [
                "paper-a",
                "paper-b",
            ],
            "questions": [
                {
                    "expectedEvidenceIds": [
                        "a1",
                        "a2",
                    ],
                    "paperId": "paper-a",
                    "questionId": "q1",
                },
                {
                    "expectedEvidenceIds": [
                        "b1",
                    ],
                    "paperId": "paper-b",
                    "questionId": "q2",
                },
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

When	Result	HTTP	Time	Price
40 min ago	Passed	402	373 ms	$0.074
5 h ago	Passed	402	734 ms	$0.074
9 h ago	Passed	402	395 ms	$0.074
13 h ago	Passed	402	390 ms	$0.074
17 h ago	Passed	402	319 ms	$0.074

Show 10 older checks

21 h ago	Passed	402	920 ms	$0.074
25 h ago	Passed	402	450 ms	$0.074
29 h ago	Passed	402	338 ms	$0.074
33 h ago	Passed	402	351 ms	$0.074
37 h ago	Passed	402	223 ms	$0.074
40 h ago	Passed	402	609 ms	$0.074
44 h ago	Passed	402	420 ms	$0.074
2 days ago	Passed	402	641 ms	$0.074
2 days ago	Passed	402	498 ms	$0.074
2 days ago	Passed	402	378 ms	$0.074

Trust score 75/ 100

Availability (30-day uptime)		30 / 30
Valid x402 challenge		15 / 15
Response time		7 / 10
Real paying agents (30 days)		3 / 15
Charges what it lists		10 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.074 per call
Listed at: $0.074
Token: USDC
Networks: Base, Arbitrum, Polygon
Pays to: 0xec84…de28

Real usage

Paying agents: 1 in 30 days
Paid calls: 1 in 30 days
Last paid call: 4 days ago

Source: x402 Bazaar settlement data.

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