RDS & CO MCP server

Which servers in the official MCP registry are RDS & CO's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-14

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Whose server it is

Registry nameco.rahuldsarker/growth-toolsverified in the MCP registry

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

When we asked itchecked 2026-10-14

Stateanswerschecked 2026-10-14
Tools123
Server calls itselfco.rahuldsarker/growth-tools
Server version1.3.0
Protocol version2025-06-18

On 2026-10-14 the server answered initialize and tools/list without a sign-in. First answer in 129 ms.

Tools it offers123 tools · read 2026-10-14

search_content
Search rahuldsarker.co for articles, long-form guides and client case studies on fractional CMO work, revenue operations, attribution, server-side tracking, performance marketing, CRM and AI marketing. Returns titles, summaries and links…
read_content
Get the full text of one rahuldsarker.co article or case study, by its slug or URL (from search_content), so you can quote it accurately. Always cite the returned link.
check_availability
List open times for a free call with Rahul D Sarker (fractional CMO and RevOps consultant), live from his calendar. Each time comes with a link that opens the booking form with that time selected; the person confirms and books on the…
roas_calculator
Calculate ROAS, ACOS, break-even ROAS, and profit from ad revenue, ad spend, and gross margin. See the full version at https://rahuldsarker.co/calculators/roas
ltv_cac_calculator
Calculate customer LTV, CAC, the LTV:CAC ratio, and CAC payback period. See the full version at https://rahuldsarker.co/calculators/cac-ltv
ad_spend_waste_calculator
Estimate how much monthly ad budget leaks to fraud and tracking/attribution waste. See the full version at https://rahuldsarker.co/calculators/ad-spend-waste-calculator
crm_roi_calculator
Weigh a CRM subscription and implementation cost against the win-rate lift it buys. See the full version at https://rahuldsarker.co/calculators/crm-roi-calculator
mql_calculator
Turn traffic and conversion rates into MQL volume, cost per lead, and cost per MQL. See the full version at https://rahuldsarker.co/calculators/mql-calculator
arr_multiple_calculator
Apply conservative, market, premium, and custom ARR multiples to see the valuation range they imply. See the full version at https://rahuldsarker.co/calculators/arr-multiple-calculator
mrr_to_arr_calculator
Annualize MRR into ARR, with an optional 12-month projection from expected net-new monthly revenue. See the full version at https://rahuldsarker.co/calculators/mrr-to-arr-calculator
saas_magic_number_calculator
Measure how efficiently sales and marketing spend turns into new ARR. See the full version at https://rahuldsarker.co/calculators/saas-magic-number-calculator
cpl_cpa_calculator
Calculate cost per lead, expected customers, and cost per acquisition from spend, leads, and a lead-to-customer conversion rate. See the full version at https://rahuldsarker.co/calculators/cpl-cpa
roas_to_mer_converter
Compare a platform-reported ROAS against your true blended Marketing Efficiency Ratio (MER) to see how much pixels over-claim. See the full version at https://rahuldsarker.co/calculators/roas-to-mer-converter
ppc_click_volume_predictor
Predict monthly clicks, conversions, and effective CPA from budget, CPC, and conversion rate, and check whether volume clears the ~50 weekly conversions platforms need to exit learning. See the full version at…
ad_creative_fatigue_forecaster
Forecast how many days until an ad audience hits its fatigue frequency ceiling, and the date to have fresh creative ready. See the full version at https://rahuldsarker.co/calculators/ad-creative-fatigue-forecaster
cpa_to_cac_scalability_matrix
Project how CPA/CAC inflates as you double and triple ad spend, given a per-doubling decay rate. See the full version at https://rahuldsarker.co/calculators/cpa-to-cac-scalability-matrix
retargeting_pool_size_estimator
Estimate the addressable retargeting pool from monthly visitors, window, and match rate, plus the budget needed to hit a target weekly frequency. See the full version at https://rahuldsarker.co/calculators/retargeting-pool-size-estimator
performance_marketing_margin_protector
Calculate the break-even and maximum CPA that protect a target profit margin, and check current CPA against that ceiling. See the full version at https://rahuldsarker.co/calculators/performance-marketing-margin-protector
impression_share_opportunity_matrix
Estimate missed conversions and revenue from operating below 100% impression share on a search campaign. See the full version at…
cross_channel_ad_spend_allocator
Suggest a starting Google/Meta/LinkedIn budget split based on total budget and average contract value. See the full version at https://rahuldsarker.co/calculators/cross-channel-ad-spend-allocator
linkedin_ad_cost_threshold_calculator
Calculate implied CAC from LinkedIn CPC, landing conversion, and close rate, and check it against the maximum CAC a contract can fund. See the full version at https://rahuldsarker.co/calculators/linkedin-ad-cost-threshold-calculator
seasonal_ad_cpm_predictor
Project CPM and reach impact for a given season (back-to-school, Black Friday, Q4, January) from a baseline CPM. See the full version at https://rahuldsarker.co/calculators/seasonal-ad-cpm-predictor
micro_budget_ad_feasibility_checker
Check whether a small daily ad budget can generate the ~50 weekly conversions platforms typically need to exit the learning phase. See the full version at https://rahuldsarker.co/calculators/micro-budget-ad-feasibility-checker
google_search_impression_share_value_estimator
Estimate missed clicks, conversions, and revenue from operating below 100% search impression share. See the full version at https://rahuldsarker.co/calculators/impression-share-opportunity-matrix
lookalike_audience_pool_calculator
Estimate the addressable pool from a lookalike percentage and market population, and grade seed audience quality. See the full version at https://rahuldsarker.co/calculators/lookalike-audience-pool-calculator
ad_frequency_risk_checker
Calculate average ad frequency from impressions and reach, and flag whether it is healthy, caution, or fatigue territory. See the full version at https://rahuldsarker.co/calculators/ad-frequency-risk-checker
landing_page_vs_ad_match_quality_auditor
Score message-match continuity between an ad and its landing page across five weighted criteria (headline, keyword, offer, CTA, visuals). See the full version at https://rahuldsarker.co/calculators/landing-page-vs-ad-match-quality-auditor
utm_generator_and_validation_helper
Generate a cleaned, encoded UTM-tagged URL from source, medium, campaign, term, and content, and flag common tagging errors. See the full version at https://rahuldsarker.co/calculators/utm-generator-and-validation-helper
paid_search_intent_tier_grader
Grade a list of search keywords into transactional, commercial, or informational intent tiers, and flag the wasted-intent share. See the full version at https://rahuldsarker.co/calculators/paid-search-intent-tier-grader
creative_testing_duration_forecaster
Forecast how many days an ad creative test needs to reach a sound sample size, from daily spend, expected CPA, variant count, and conversions needed per variant. See the full version at…
post_ios14_blended_attribution_modeler
Compare summed platform-claimed revenue against actual backend revenue to quantify over-reporting and the true blended ROAS. See the full version at https://rahuldsarker.co/calculators/post-ios14-blended-attribution-modeler
in_house_vs_fractional_cmo
Compare the loaded annual cost of a full-time CMO hire against a fractional CMO retainer, including the ramp-up cost before a full-time hire makes impact. See the full version at…
growth_runway_extension_simulator
See how much cash runway a cut to gross burn buys you, given current cash, burn, and revenue. See the full version at https://rahuldsarker.co/calculators/growth-runway-extension-simulator
total_addressable_market_estimator
Build a bottom-up TAM, SAM, and SOM from company counts, reachable share, ACV, and obtainable market share. See the full version at https://rahuldsarker.co/calculators/total-addressable-market-estimator
brand_vs_performance_budget_allocator
Split a marketing budget between brand and performance spend based on company stage, using the Binet & Field long/short research as a directional guide. See the full version at…
product_market_fit_scoring_grader
Score product-market fit signals (the "very disappointed" test, retention, organic pull, NPS) into a weighted 0-100 PMF score and scale-readiness verdict. See the full version at…
customer_expansion_revenue_matrix
Compound net monthly expansion revenue (upsell + cross-sell minus contraction) forward 1, 2, and 3 years from current ARR, with no new logos. See the full version at https://rahuldsarker.co/calculators/customer-expansion-revenue-matrix
growth_strategy_prioritization_tool
Rank growth ideas by ICE score (Impact, Confidence, Ease averaged, each scored 1-10) to decide what to run next. See the full version at https://rahuldsarker.co/calculators/growth-strategy-prioritization-tool
pricing_elasticity_sandbox
Model how a price change affects volume, revenue, and gross profit given a price elasticity of demand. See the full version at https://rahuldsarker.co/calculators/pricing-elasticity-sandbox
burn_rate_optimization_forecaster
Simulate month by month, at a given revenue growth rate and gross margin, how many months until gross profit covers fixed burn, and the cash needed to bridge the gap. See the full version at…
marketing_agency_pitch_bullshit_detector
Score an agency pitch on whether it's grounded in real, verifiable outcomes or dressed-up vanity metrics and vague promises. Answer 6 checks and get a credibility score, a BS meter, and a verdict before you sign anything. See the full…
competitor_ad_spend_benchmarker
Estimate a competitor's ad spend from share-of-voice data, assuming spend maps roughly to share of voice within the same auction. See the full version at https://rahuldsarker.co/calculators/competitor-ad-spend-benchmarker
ltv_growth_multiplier_simulator
Show how much gross-margin LTV grows when monthly churn improves, using LTV = ARPA x gross margin / monthly churn. See the full version at https://rahuldsarker.co/calculators/ltv-growth-multiplier-simulator
channel_saturation_estimator
Project how many months until a channel's compounding CPA inflation pushes it past your max viable CPA. See the full version at https://rahuldsarker.co/calculators/channel-saturation-estimator
product_led_growth_feasibility_grader
Score whether a product can support a self-serve, product-led growth motion, versus a hybrid or sales-led approach, across 5 weighted criteria. See the full version at…
growth_team_hiring_sequence_planner
Recommend the right growth/marketing hiring sequence for your ARR band, from founder-led at pre-$1M to a full leadership team at $10M+. See the full version at https://rahuldsarker.co/calculators/growth-team-hiring-sequence-planner
bootstrapped_vs_venture_scaler_modeler
Compare a founder's take-home from a bootstrapped exit against a venture-backed, diluted exit, and find the break-even exit value where raising starts to pay off. See the full version at…
internationalization_market_prioritization_grid
Score a candidate international market on size, localization ease, competitive whitespace, regulatory ease, and payments/GTM readiness to decide whether to prioritize, plan, or deprioritize it. See the full version at…
annual_growth_goal_back_calculator
Work backwards from an annual revenue goal, through ACV and close rates, to the traffic and leads needed per month to hit it. See the full version at https://rahuldsarker.co/calculators/annual-growth-goal-back-calculator
organic_traffic_value_monetizer
Value organic search traffic in ad-equivalent spend (clicks x CPC), and split out the non-branded portion that represents genuine, defensible SEO value. See the full version at…
strategic_pivot_risk_grader
Grade the risk of pivoting upmarket to enterprise across sales motion, pricing/packaging, cash buffer, product compliance, and team experience. See the full version at https://rahuldsarker.co/calculators/strategic-pivot-risk-grader
conversion_funnel
Calculate conversion rate and the traffic needed to hit a target number of conversions at that rate. See the full version at https://rahuldsarker.co/calculators/conversion-funnel
ab_test_significance_calculator
Run a two-proportion z-test on an A/B test to get relative uplift and statistical confidence. See the full version at https://rahuldsarker.co/calculators/ab-test-significance-calculator
page_speed_leak_calculator
Estimate the extra conversions and revenue recovered by cutting page load time, using an industry-average per-second conversion penalty. See the full version at https://rahuldsarker.co/calculators/page-speed-leak-calculator
above_the_fold_messaging_clarity_grader
Score a hero section's five-second clarity across five weighted checks (what you do, outcome, CTA, jargon, subhead) into a 0-100 clarity verdict. See the full version at…
micro_conversion_value_modeler
Back into a proxy dollar value for an early-funnel micro-conversion from the value of a won customer and the micro-to-customer conversion rate. See the full version at https://rahuldsarker.co/calculators/micro-conversion-value-modeler
cart_abandonment_calculator
Calculate revenue lost to cart abandonment and how much a recovery flow could win back. See the full version at https://rahuldsarker.co/calculators/cart-abandonment-calculator
cta_visual_hierarchy_tester
Score a call-to-action button's visibility using its real WCAG contrast ratio against the background plus size and placement. See the full version at https://rahuldsarker.co/calculators/cta-visual-hierarchy-tester
typography_legibility_grader
Score body copy legibility on font size, line height, and line length against ideal bands, into a 0-100 score. See the full version at https://rahuldsarker.co/calculators/typography-legibility-grader
mobile_checkout_friction_tester
Score a mobile checkout flow's friction from step count, guest checkout, wallet pay, autofill, and mobile input types into a 0-100 score. See the full version at https://rahuldsarker.co/calculators/mobile-checkout-friction-tester

The first 60 of 123, as the server listed them.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "growth-tools": {
      "type": "http",
      "url": "https://rahuldsarker.co/api/mcp"
    }
  }
}

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.