← The evidence ledger
Evidence row 120655
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/stats/regression
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 57ecb13b45c799639533e61d197cf3c2247eeddc6aae288fe7c931f1fc08b9a9
- Leaf
- 0x87cee640f4cb3ceaf9d5069fcab736f85f08db5f9a26c58250aef5138686486a
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/stats/regression"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:linear-regressio",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:linear-regressio",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:linear-regressio",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:datadesk:linear-regressio",
"reference": "EaHgGbT6QuxqqNjCgjXAuon6TBTgfeyFAFYXtZ61EzcD",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaW5lYXItcmVncmVzc2lvbiIsInJlZmVyZW5jZSI6IkVhSGdHYlQ2UXV4cXFOakNnalhBdW9uNlRCVGdmZXlGQUZZWHRaNjFFemNEIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTIzOTAwNjI5Mzl9.Ki_OC7GXLPDX_b3qKvtDZ3FWeqYNDaG9Ervv1DG-I7o"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:datadesk:linear-regressio",
"reference": "69u8XKyTD34G2uQMdvLEmyPpHsVuGuChNJbrzf172wwc",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaW5lYXItcmVncmVzc2lvbiIsInJlZmVyZW5jZSI6IjY5dThYS3lURDM0RzJ1UU1kdkxFbXlQcEhzVnVHdUNoTkpicnpmMTcyd3djIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTIzOTAwNjI5Mzl9.doyzpInPaw1lqp--K-BMbYu-XArFDpxV293P9JH61ww"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "91794",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:linear-regressio",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "94634",
"reference": "tAehWwyJSZ5YscinfaJh3bWxpxustbLMELcdZhS59DB",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaW5lYXItcmVncmVzc2lvbiIsInJlZmVyZW5jZSI6InRBZWhXd3lKU1o1WXNjaW5mYUpoM2JXeHB4dXN0YkxNRUxjZFpoUzU5REIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTE3OTQsImV4cCI6MTc5MjM5MDA2MjkzOX0.DVbtUHofnj4QzwcaMWtmxcZpKtQ9P5grhhF6Zc1dtCc",
"solUsdPrice": 105.67
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Linear regression on two lists - slope, intercept, r, r-squared, standard errors, p-value, 95% slope interval, equation and a prediction for a new x",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"predict_x": "6",
"x": "1,2,3,4,5",
"y": "2,4,5,4,5"
},
"type": "http"
},
"output": {
"example": {
"equation": "y = 0.6 * x + 2.2",
"intercept": 2.2,
"intercept_std_error": 0.938083152,
"interpretation": "moderate linear relationship",
"n": 5,
"prediction": {
"extrapolated": true,
"x": 6,
"y": 5.8
},
"r": 0.77459667,
"r_squared": 0.6,
"residual_std_error": 0.894427191,
"slope": 0.6,
"slope_95_ci": [
-0.3001317453,
1.500131745
],
"slope_p_value": 0.124027,
"slope_std_error": 0.2828427125,
"slope_t": 2.1213203,
"source": "Ordinary least squares computed on the supplied points"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"predict_x": {
"description": "optional x to predict y for",
"type": "string"
},
"x": {
"description": "Comma-separated x values, 3-500",
"type": "string"
},
"y": {
"description": "Comma-separated y values, same count as x",
"type": "string"
}
},
"required": [
"x",
"y"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"equation": {
"description": "Fitted line as text",
"type": "string"
},
"intercept": {
"description": "Value of y when x is 0",
"type": "number"
},
"intercept_std_error": {
"description": "Intercept std error",
"type": [
"number",
"null"
]
},
"interpretation": {
"description": "Plain-language reading of the result",
"type": "string"
},
"n": {
"description": "Number of points",
"type": "number"
},
"prediction": {
"description": "Predicted y for predict_x and whether it extrapolates beyond the data",
"properties": {
"extrapolated": {
"description": "True when x is outside the range of the data",
"type": [
"boolean",
"null"
]
},
"x": {
"description": "The x that was predicted for",
"type": [
"number",
"null"
]
},
"y": {
"description": "Predicted y",
"type": [
"number",
"null"
]
}
},
"type": [
"object",
"null"
]
},
"r": {
"description": "Pearson correlation coefficient",
"type": "number"
},
"r_squared": {
"description": "R squared",
"type": "number"
},
"residual_std_error": {
"description": "Residual std error",
"type": "number"
},
"slope": {
"description": "Change in y per unit of x",
"type": "number"
},
"slope_95_ci": {
"description": "Slope 95 ci",
"type": "array"
},
"slope_p_value": {
"description": "Slope p value",
"type": "number"
},
"slope_std_error": {
"description": "Slope std error",
"type": [
"number",
"null"
]
},
"slope_t": {
"description": "Slope t",
"type": [
"number",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
}
},
"required": [
"n",
"slope",
"intercept",
"r_squared"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-19T06:05:42.982Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-19T06:05:42.659Z"
},
"resource": "https://saylorinnovations.com/api/stats/regression",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"linear regression from two lists",
"line of best fit slope",
"r squared of my data",
"predict y from x with a trend",
"is the trend statistically"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Linear regression on two lists - slope, intercept, r, r-squared, standard errors, p-value, 95% slope interval, equation and a prediction for a new x"
}What the leaf hashes
{"body":"57ecb13b45c799639533e61d197cf3c2247eeddc6aae288fe7c931f1fc08b9a9","id":120655,"kind":"listing","method":"baseline/1","observed_us":1793025618427109,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/stats/regression","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x87cee1b79f9160c74ca982c97c8bc06c8f2475ec002182ea947afbe7d71d7637
- 0xe715785d661920a41f27d4d0652c1fed2a3c3f13bbfaef6841fef14f3923d12e
- 0xc23c84fafe0f2bd42cf8254106437b54c3d25016682f74383d95139620244390
- 0x26960433ba2a46a948fa2b9731848afe6a6ee0c295dfd1dcc280646ef816143a
- 0xbb4cf580a022f32b632eb1b41e27fb95785ac0e5c48263eaa2191199b94bff5f
- 0x327f089d9f6c4455187c7f123d73bafca52b5e508804f5c4f2a9950a4f3c3509
- 0x3f7fc65bceb16da78472e40edad8dc4d1c7d65e88bffd38228137c82695e3218
- 0x3e44539969b35db004be22e9312e042a24f58703edcae1cfbac08e741b28a8fb
- 0xbaa1ce1c5cbf1b3300a4244927f40a028bd6b41ac39500640cecb2b188c7a0dd
- 0x07754f5d18ae94a58145ba055e77f9866d011c666e0e742dac34d5f46dce7f76
- 0xab0c5c1fde083e427b8955a771d679773808751fc069bed2944e88e84fcb655e
- 0x099dd43573993f2a1bea674129b7ed050429a0ac76c3bfda8aaf82a3af126469
- 0x49d11be052a4c069b10250aaba214f566b3f2e5aaa7a98e82ccc6a71c0e801a0
- 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
- 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae