Retainer MCP server

• Registry namecom.useretainer/toolsverified in the MCP registry

The registry name sits under useretainer.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-25
• Tools5
• Server calls itselfretainer
• Server version1.1.0
• Protocol version2025-06-18

On 2026-10-25 the server answered initialize and tools/list without a sign-in. First answer in 113 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 2 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
• Answeredmeasuring2 of the 7 daily checks it takes to print a share
• Median first answer1076 ms
• Space in an agent's context≈ 1,573 tokensthe definitions of all its tools (5), which an agent carries on every turn
• Tool definitionsA · 90 of 100
• Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 3 of 5

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• map_stakeholders

  Sort stakeholders on a power/interest grid (Mendelow's matrix) into Manage Closely, Keep Satisfied, Keep Informed, and Monitor, with what to do for each group. Returns a link that opens the finished map in Retainer's free stakeholder…

• calculate_consulting_rate

  Work out what an independent consultant should charge: minimum and recommended hourly rate, day rate, monthly equivalent, and a suggested monthly retainer or project day rate. Use when someone asks what to charge, how to price a retainer…

• check_capacity

  Check whether an independent consultant has room for another client: available billable hours, current utilization, and whether they are under target, over target, or overcommitted. Use when someone asks if they can take on new work or…

• rank_client_profitability

  Rank a consultant's clients by revenue per hour, with totals and the average, and flag which clients earn below average. Use when someone asks which clients are worth keeping, which to raise prices on, or why they're busy but not earning…

• find_neglected_relationships

  Check which clients, past clients, or referral sources a consultant has gone too long without talking to. Sorts contacts by days of silence into healthy (<30 days), cooling (30+), neglected (60+), and urgent (90+), with a suggested next…