← The evidence ledger
Evidence row 2202008
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://data-calc.x402tookit.com/erlang-staffing
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 30e68be81f60cf19de52cc8431b7ccfd9987dd10cce35b7b9491ca8c358c2555
- Leaf
- 0xf67b6bdbe18bae117a5b2d7942f5cb90a9ca5c5e3e94f96e8646f8baa059b96b
What was observed
{
"endpoints": [
[
"x402",
"https://data-calc.x402tookit.com/erlang-staffing"
]
],
"name": "Systems Capacity Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Erlang B and C: trunks for a blocking target, or agents for a service level such as 80 percent answered in 20 seconds.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"mode": "b",
"targetBlocking": 0.01,
"trafficErlangs": 10
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T20:19:39.187Z",
"blockingAtSolution": 0.007142438157899779,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"mode": "b",
"neighbours": [
{
"blocking": 0.0364969454723708,
"carriedErlangs": 9.635030545276292,
"occupancy": 0.6423353696850861,
"trunks": 15
},
{
"blocking": 0.022301872040363657,
"carriedErlangs": 9.776981279596365,
"occupancy": 0.6110613299747727,
"trunks": 16
}
],
"notChecked": [
"shrinkage: breaks, absences and training (divide by the share of time agents are actually on the phones)",
"abandonment and retrials, which change real offered load",
"…2 more"
],
"reasons": [
"Erlang B assumes blocked calls are cleared (lost), with no queue: B(0) = 1, B(k) = A B(k-1) / (k + A B(k-1)).",
"Trunks needed grow more slowly than traffic: bigger groups run more efficiently."
],
"source": "computed locally (Erlang B and C)",
"summary": "10 erlangs needs 18 trunks for at most 1.00% blocking (actual 0.714%).",
"targetBlocking": 0.01,
"trafficErlangs": 10,
"trunksNeeded": 18,
"verdict": "SIZED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"answerSeconds": {
"description": "Mode c: the answer-time threshold in seconds (default 20)",
"type": "number"
},
"handlingSeconds": {
"description": "Mode c: average handling time in seconds (default 180)",
"type": "number"
},
"mode": {
"description": "c (default): agents for a service level, queueing allowed. b: trunks for a blocking target, no queue",
"type": "string"
},
"serviceLevel": {
"description": "Mode c: fraction answered within answerSeconds, e.g. 0.8 (default 0.8)",
"type": "number"
},
"targetBlocking": {
"description": "Mode b: acceptable blocking probability, e.g. 0.01 (default 0.01)",
"type": "number"
},
"trafficErlangs": {
"description": "Offered load A in erlangs = arrival rate x average handling time (e.g. 120 calls/hour x 3 min = 6 E)",
"type": "number"
}
},
"required": [
"trafficErlangs"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"blockingAtSolution": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"mode": {
"type": [
"null",
"string"
]
},
"neighbours": {
"items": {
"properties": {
"blocking": {
"type": [
"null",
"number"
]
},
"carriedErlangs": {
"type": [
"null",
"number"
]
},
"occupancy": {
"type": [
"null",
"number"
]
},
"trunks": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"targetBlocking": {
"type": [
"null",
"number"
]
},
"trafficErlangs": {
"type": [
"null",
"number"
]
},
"trunksNeeded": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:47:10.153Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:47:09.892Z"
},
"resource": "https://data-calc.x402tookit.com/erlang-staffing",
"serviceName": "Systems Capacity Calculators",
"tags": [
"erlang",
"call-center",
"staffing",
"trunks"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Erlang B and C: trunks for a blocking target, or agents for a service level such as 80 percent answered in 20 seconds."
}What the leaf hashes
{"body":"30e68be81f60cf19de52cc8431b7ccfd9987dd10cce35b7b9491ca8c358c2555","id":2202008,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811324058,"prev":null,"subject":"x402_bazaar:https://data-calc.x402tookit.com/erlang-staffing","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xf67b56b001646fb07f507c2047d7e21e5e3465e87b2a88ad10a1ba0ed5bb2143
- 0x3bad6e652c759e8eabe80b04f6fb89240b09627678564e9d90bd9de8c6ff9787
- 0x1f70c8342fb674b676fcc6ed153eb903f9a1b480f1e88adec8ccec651567fc7d
- 0x615cfa2aaaef4987450eeebe40127b06e8bdcc3a379a06dc1f8d6870aa18ac1e
- 0xae217653dbc8d5c482876d00f371f2ce9a9089c92f018878134ed52170ca6b4f
- 0xfc94309bcc0e0ca77d4e0ed88bde66b54449ea36f9cb594c5851dea178133130
- 0xede292e8664bc7d8eeb0880fdd3c85013817d0a234ef3ad72d92d0c9d3984f37
- 0xaf76baf7750287b22ea2d0844e51a1940a14860862847ece6aad84937dd0176b
- 0x01b4d35a3451c31adfb3251b328911b3e4643951d7424a7492b5cffabe6e1662
- 0x3962dc21dfb6ecc224070ed75a3ed1a05501776d7717009c4e462115e41f3871
- 0xe1e2352569523d4efc6bfc370502b55514e254ca4b18e29cdb4dcaec5aa0f4ab
- 0x357b8b944aeb5a828c72699fe2ac56982a5ebd57521270f90ff495bcf87b9654
- 0x54a66ecba86fe13527453978f73a6a3d80e1817889872b25f2a79c90d4b86982
- 0x70f4b5a4c6a4de9977aecf5fbe7497e271e9e2f9e5068c7dad5953e8fe898b30
- 0x4068a4306db47ea0eae5f76e5137753caa3dbb132dca6a61a4d6c1838a52700f
- 0x25127db2e775737b2874f6a159f7c1bf984317eea6482e94589c3ef4c5ccab32
- 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af