defrr

com.defrr/defrrVersion 1.4.1

RevRec schedules, renewals, credits, usage pricing, multi-currency, back-dated. Saves drafts.

Status

Responds256 msNov 14, 2026, 13:53 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:53 UTC
Latency: 256 ms
Remotes responding: 1 of 1
Sign-in: API key
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://defrr.com/v1/mcpResponds256 msNov 14, 2026, 13:53 UTC

No sign-in

Claude Code

claude mcp add --transport http defrr https://defrr.com/v1/mcp --header 'Authorization: Bearer <YOUR_TOKEN>'

Replace <YOUR_TOKEN> before running.

Claude Desktop and claude.ai

Settings > Connectors > Add custom connector
Name: defrr
Remote MCP server URL: https://defrr.com/v1/mcp
This server expects the header Authorization.

Cursor

{
  "mcpServers": {
    "defrr": {
      "url": "https://defrr.com/v1/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_TOKEN>"
      }
    }
  }
}

Replace <YOUR_TOKEN> before running.

VS Code

code --add-mcp '{"name":"defrr","type":"http","url":"https://defrr.com/v1/mcp","headers":{"Authorization":"Bearer <YOUR_TOKEN>"}}'

Replace <YOUR_TOKEN> before running.

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Tools

9 tools

Tools of defrr
	Description		Read-only	Idempotent	Open world
`defrr_cancel_contract`Use when a whole contract is voided and refunded. Reverses everything recognised in closed months and removes the rest. Costs 2 credits (refunded if it fails).	Use when a whole contract is voided and refunded. Reverses everything recognised in closed months and removes the rest. Costs 2 credits (refunded if it fails).	No	Yes	Yes	No
`defrr_cancel_renewal`Use when the latest renewal is cancelled and refunded in full. Returns the credit note, the reversal for closed months and the revenue month by month. Costs 2 credits (refunded if it fails).	Use when the latest renewal is cancelled and refunded in full. Returns the credit note, the reversal for closed months and the revenue month by month. Costs 2 credits (refunded if it fails).	No	Yes	Yes	No
`defrr_create_contract`Use when a new deal is signed and you need its revenue and billing schedule worked out from the terms, without saving it anywhere. Returns every month's billing, revenue and deferred balance, and the contract's totals. For a deal priced in a foreign currency, send currency and exchangeRate and the term prices in that currency. For a contract that started in months that are already closed (a back-dated contract), pass lockedThrough: the months from its start through that month are caught up as one lump of revenue in the first open month, the way defrr's app does, and the result says how much (foreign currency works; a single-term contract needs a quantity of 1, renewals are fine). Nothing is corrected, credited or saved: to record the contract in the user's defrr organization, use defrr_save_contract instead, if you have it. Costs 1 credit (refunded if it fails).	Use when a new deal is signed and you need its revenue and billing schedule worked out from the terms, without saving it anywhere. Returns every month's billing, revenue and deferred balance, and the contract's totals. For a deal priced in a foreign currency, send currency and exchangeRate and the term prices in that currency. For a contract that started in months that are already closed (a back-dated contract), pass lockedThrough: the months from its start through that month are caught up as one lump of revenue in the first open month, the way defrr's app does, and the result says how much (foreign currency works; a single-term contract needs a quantity of 1, renewals are fine). Nothing is corrected, credited or saved: to record the contract in the user's defrr organization, use defrr_save_contract instead, if you have it. Costs 1 credit (refunded if it fails).	No	Yes	Yes	No
`defrr_create_waterfall`Use when you need the deferred revenue roll-forward for a set of contracts: send up to 50 contracts' terms and get back, for each contract and for all of them together, every month's billing, revenue and ending deferred balance (opening deferred balance + billing - revenue = ending). Each contract is built like defrr_create_contract. Everything or nothing: if one contract is rejected the call fails and nothing is charged. Costs 1 credit per contract (refunded if it fails). Nothing you send is stored. For more than 50 contracts, send them in batches of up to 50, each saying which batch it is (batch: number and of) and passing in the carry returned by the batch before; the last batch returns grandTotal for all of them. For a very large set, call the REST API from a script instead of through the model.	Use when you need the deferred revenue roll-forward for a set of contracts: send up to 50 contracts' terms and get back, for each contract and for all of them together, every month's billing, revenue and ending deferred balance (opening deferred balance + billing - revenue = ending). Each contract is built like defrr_create_contract. Everything or nothing: if one contract is rejected the call fails and nothing is charged. Costs 1 credit per contract (refunded if it fails). Nothing you send is stored. For more than 50 contracts, send them in batches of up to 50, each saying which batch it is (batch: number and of) and passing in the carry returned by the batch before; the last batch returns grandTotal for all of them. For a very large set, call the REST API from a script instead of through the model.	No	Yes	Yes	No
`defrr_get_credit_balance`Use to see how many credits the account has left before running a calculation. Free.	Use to see how many credits the account has left before running a calculation. Free.	Not declared	Yes	Not declared	No
`defrr_process_renewal`Use when customers renew and you need the renewal worked out: send each contract's terms as they stand, and the renewal's end date and the price for the renewal term. Returns the renewal term and how its price compares with the term before it (in total and per month, since a renewal can be a different length), the billing entry to post, the revised month-by-month schedule, and the total to post by month. With the latest closed month, a renewal processed after it started has its billing and catch-up revenue posted in the first open month instead. The renewal is recognised on the contract's own basis: a different basis is a new contract (defrr_create_contract). Up to 50 renewals per call, each with your own id. Costs 1 credit per renewal (refunded if the call fails). Nothing you send is stored.	Use when customers renew and you need the renewal worked out: send each contract's terms as they stand, and the renewal's end date and the price for the renewal term. Returns the renewal term and how its price compares with the term before it (in total and per month, since a renewal can be a different length), the billing entry to post, the revised month-by-month schedule, and the total to post by month. With the latest closed month, a renewal processed after it started has its billing and catch-up revenue posted in the first open month instead. The renewal is recognised on the contract's own basis: a different basis is a new contract (defrr_create_contract). Up to 50 renewals per call, each with your own id. Costs 1 credit per renewal (refunded if the call fails). Nothing you send is stored.	No	Yes	Yes	No
`defrr_reprice_contract`Use when the contract's ORIGINAL term (its first term, before any renewal) was priced too high and needs a credit. Renewals keep their own prices; to correct a renewal use defrr_reprice_renewal. Returns the credit note, the revenue to reverse for months already closed, and the corrected revenue month by month. Costs 2 credits (refunded if it fails).	Use when the contract's ORIGINAL term (its first term, before any renewal) was priced too high and needs a credit. Renewals keep their own prices; to correct a renewal use defrr_reprice_renewal. Returns the credit note, the revenue to reverse for months already closed, and the corrected revenue month by month. Costs 2 credits (refunded if it fails).	No	Yes	Yes	No
`defrr_reprice_renewal`Use when a renewal was priced too high and needs a credit. Returns the credit note, the revenue to reverse for months already closed, and the corrected revenue month by month. Costs 2 credits (refunded if it fails).	Use when a renewal was priced too high and needs a credit. Returns the credit note, the revenue to reverse for months already closed, and the corrected revenue month by month. Costs 2 credits (refunded if it fails).	No	Yes	Yes	No
`defrr_usage_billing`Use when customers are billed on what they use and you need the usage turned into what it costs, month by month. Send each customer-and-product's pricing (flat or volume tiers, a prepaid credit balance, or a hybrid: a fixed monthly fee with included units and a price per unit above them) and the quantity used in each month; get back each month's revenue, the total across all of them, and any prepaid overage (units beyond the balance, flagged and not priced). A hybrid line returns revenue (the fixed fee, which excludes overage), overage (units over the allowance, priced) and revenueInclOverage for each month. Without a startDate the allowance starts again each month you list. With a startDate (and dated usage entries) the cycles follow the contract's anniversary: the fee is booked in full in the month each cycle starts, whether or not anything was used, and the overage in the month the cycle ends; the response also lists each cycle. Quantities are what was used in that month, not a running total. Tiers price band by band, and the bands start again each month. Costs 1 credit per line (refunded if it fails). Nothing you send is stored.	Use when customers are billed on what they use and you need the usage turned into what it costs, month by month. Send each customer-and-product's pricing (flat or volume tiers, a prepaid credit balance, or a hybrid: a fixed monthly fee with included units and a price per unit above them) and the quantity used in each month; get back each month's revenue, the total across all of them, and any prepaid overage (units beyond the balance, flagged and not priced). A hybrid line returns revenue (the fixed fee, which excludes overage), overage (units over the allowance, priced) and revenueInclOverage for each month. Without a startDate the allowance starts again each month you list. With a startDate (and dated usage entries) the cycles follow the contract's anniversary: the fee is booked in full in the month each cycle starts, whether or not anything was used, and the overage in the month the cycle ends; the response also lists each cycle. Quantities are what was used in that month, not a running total. Tiers price band by band, and the bands start again each month. Costs 1 credit per line (refunded if it fails). Nothing you send is stored.	No	Yes	Yes	No

Details

Registry status: Active
Published: Nov 7, 2026
Updated: Nov 7, 2026
Website: https://defrr.com/developers⁠ (opens in a new tab)
Repository: https://github.com/defrr-com/defrr-mcp⁠ (opens in a new tab)
Categories (suggested): Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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