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Erlang B & C Staffing Calculator
x402
Erlang B & C Staffing Calculator is a paid API for AI agents from data-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates the number of trunks (Erlang B) or agents (Erlang C) needed to meet a blocking probability target or service level objective given offered traffic load in erlangs.
Price / call$0.02
Success—
StatusUnknown
How this service works
Erlang B and C: trunks for a blocking target, or agents for a service level such as 80 percent answered in 20 seconds.
Output
Returns the recommended number of trunks or agents needed, the achieved blocking probability or service level, occupancy/utilisation, a summary verdict, and a neighbour table showing metrics for ±N trunks/agents around the optimal solution.
Example use cases
Call center agent headcount planning
“We're getting about 200 calls per hour, each lasting around 4 minutes on average. How many agents do we need to answer 80% of calls within 20 seconds? Use Erlang C.”
SIP trunk sizing for PBX
“Our office handles roughly 15 erlangs of offered traffic. How many SIP trunks do we need to keep blocking below 1%? Use Erlang B mode.”
Service level sensitivity check
“If I have 12 erlangs of traffic and 18 agents with 3-minute average handle time, what service level will I hit — what fraction of calls get answered within 20 seconds?”
Technical details
Endpoint
GEThttps://data-calc.x402tookit.com/erlang-staffing?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need classic Erlang B or C staffing/trunking calculations for telephony or call-center capacity planning. Prefer it over generic queueing endpoints (M/M/c) when you specifically need the telecom-standard blocking or service-level formulas with a neighbour sensitivity table. Choose Erlang B mode for circuit-switched trunks with no queuing; Erlang C mode for agent staffing where calls queue.
Side effects
- Missing required trafficErlangs parameter returns validation error
- Extremely high traffic load with no feasible agent count may return degraded/infeasible result
- Invalid mode string (not 'b' or 'c') may default or error
- serviceLevel outside (0,1) or negative handlingSeconds returns bad-request
- Network timeout or upstream service unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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