Every server speaks MCP Streamable HTTP at https://mcp.moltlinestudio.com/<server>.
The free tier needs no registration, no account, and no credentials — connect and call tools immediately.
Independently audited by MCPize — the catalog endpoint scores A, 94/100. Machine-readable discovery via the
API catalog; access details in the
agent access guide.
In Claude Desktop, Claude Code, Cursor, Codex CLI or any client that speaks MCP
Streamable HTTP, add a server with the URL
https://mcp.moltlinestudio.com/timeops. Then ask your agent:
“how many business days between March 3 and April 17, skipping US
holidays?”
It calls business_days and returns an exact answer instead of a
confident guess. Language models are still unreliable at calendar arithmetic, and
this is the cheapest possible fix. The same paste-and-ask loop works on all
twenty-two servers below — just swap the slug.
If your client only speaks stdio, there is a zero-dependency open-source bridge: one Python file, MIT licensed, nothing to install.
https://mcp.moltlinestudio.com/catalog
Discovery and licensing for the whole Moltline line: search the 138-bundle catalog, browse the server fleet, and look up any product before you buy or build.
Tools (10): search_catalog, preview_product, get_free_skill, list_kits, upgrade_info, get_full_persona, get_full_skill, get_full_product, get_full_kit, recommend_products.
Free tools: search_catalog, preview_product, get_free_skill, list_kits, upgrade_info, recommend_products. Premium (All-Access license): get_full_persona, get_full_skill, get_full_product, get_full_kit.
https://mcp.moltlinestudio.com/codereview
Code review tooling for human- and AI-written code: structured review passes, checklists, and verification aids that catch what a quick skim misses.
Tools (7): review_diff, ai_code_smell_scan, complexity_report, secret_scan, review_checklist, security_deep_dive, get_reviewer_persona.
Free tools: review_diff, ai_code_smell_scan, complexity_report, secret_scan, review_checklist. Premium (All-Access license): security_deep_dive, get_reviewer_persona.
https://mcp.moltlinestudio.com/timeops
Deterministic time operations for agents: business-day math, meeting overlap, recurrence expansion, deadline planning, and SLA due dates.
Tools (5): business_days, meeting_overlap, recurrence_expand, deadline_planner, sla_due.
Free tools: business_days, meeting_overlap, recurrence_expand. Premium (All-Access license): deadline_planner, sla_due.
https://mcp.moltlinestudio.com/data
Practical data utilities for everyday agent workflows: parsing, transforms, cleanup, and format conversion.
Tools (7): csv_profile, ab_test, correlation, growth_rates, funnel_report, cohort_retention, forecast_trend.
Free tools: csv_profile, ab_test, correlation, growth_rates. Premium (All-Access license): funnel_report, cohort_retention, forecast_trend.
https://mcp.moltlinestudio.com/business
Small-business operations: the back-office workflows an owner actually runs every week, from tracking what is overdue to keeping commitments moving.
Tools (8): list_products, get_free_skill, unit_economics, get_full_product, get_full_skill, loan_payment, cash_runway, target_price.
Free tools: list_products, get_free_skill, unit_economics, loan_payment, cash_runway, target_price. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/creator
Content creation for creators and marketing teams: hooks, outlines, captions, and repurposing.
Tools (8): list_products, get_free_skill, analyze_writing, get_full_product, get_full_skill, headline_analyzer, reading_time, social_length_check.
Free tools: list_products, get_free_skill, analyze_writing, headline_analyzer, reading_time, social_length_check. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/educator
Teaching and learning aids for educators: lesson planning, quiz and study-material generation, classroom workflows.
Tools (7): list_products, get_free_skill, readability_report, get_full_product, get_full_skill, grade_curve, lesson_timer.
Free tools: list_products, get_free_skill, readability_report, grade_curve, lesson_timer. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/govern
Agent governance auditing: policy checks, compliance gates, and review workflows for teams running agents in production.
Tools (8): agent_readiness_scan, audit_mcp_config, scope_check, audit_skill_file, injection_scan, inventory_report, governance_policy, get_auditor_persona.
Free tools: agent_readiness_scan, audit_mcp_config, scope_check, audit_skill_file, injection_scan, inventory_report. Premium (All-Access license): governance_policy, get_auditor_persona.
Start here. Add this server, then ask your agent “score stripe.com for agent readiness”. agent_readiness_scan returns a number out of 21, every failure and the exact fix, on any public domain — free, no account. For scale: the median of a hundred major sites is 8 of 21.
https://mcp.moltlinestudio.com/humanizer
Text humanizing: tone, clarity, and natural rewrites that make AI-generated drafts read like a person wrote them.
Tools (5): ai_tell_scan, voice_fingerprint, burstiness_report, humanize_plan, verify_rewrite.
Free tools: ai_tell_scan, voice_fingerprint, burstiness_report. Premium (All-Access license): humanize_plan, verify_rewrite.
https://mcp.moltlinestudio.com/merchant
Commerce helpers: product copy, listings, and storefront content for sellers.
Tools (6): processor_fees, charge_to_net, invoice_total, discount_stack, proration, installment_plan.
Free tools: processor_fees, charge_to_net, invoice_total. Premium (All-Access license): discount_stack, proration, installment_plan.
https://mcp.moltlinestudio.com/shipping
Parcel, freight and landed-cost arithmetic: dimensional weight, box fit, duty and freight class.
Tools (6): dim_weight, parcel_fit, landed_cost, freight_class, rate_card, free_shipping_threshold.
Free tools: dim_weight, parcel_fit, landed_cost, freight_class. Premium (All-Access license): rate_card, free_shipping_threshold.
https://mcp.moltlinestudio.com/shopify
Shopify catalog preparation: validate a product CSV, handles, variant counts and metafield keys before you import.
Tools (6): product_csv_check, url_handle, variant_matrix, metafield_key_check, bulk_price_change, payout_estimate.
Free tools: product_csv_check, url_handle, variant_matrix, metafield_key_check. Premium (All-Access license): bulk_price_change, payout_estimate.
https://mcp.moltlinestudio.com/dropship
Dropshipping unit economics: true margin after fees and ad spend, price ladders, lead times and SKU mapping.
Tools (6): margin_check, lead_time, sku_map_check, price_ladder, moq_planner, returns_impact.
Free tools: margin_check, lead_time, sku_map_check, price_ladder. Premium (All-Access license): moq_planner, returns_impact.
https://mcp.moltlinestudio.com/recall
A portable knowledge-graph memory: the graph is passed in and returned, so nothing you remember is stored on our side.
Tools (6): graph_upsert, graph_search, graph_diff, graph_lint, graph_at_time, graph_compact.
Free tools: graph_upsert, graph_search, graph_diff, graph_lint. Premium (All-Access license): graph_at_time, graph_compact.
https://mcp.moltlinestudio.com/vision
Computer-vision arithmetic: bounding-box conversion, image header probing, resize planning, detection metrics.
Tools (6): image_probe, bbox_convert, resize_plan, colour_check, nms, detection_metrics.
Free tools: image_probe, bbox_convert, resize_plan, colour_check. Premium (All-Access license): nms, detection_metrics.
https://mcp.moltlinestudio.com/regclock
Incident-reporting deadlines computed from the legal text - EU CRA, NIS2, DORA, GDPR, UK GDPR, HIPAA and SEC Form 8-K - with citations, business-day and bank-holiday rules, a statutory-criteria classifier and calendar export. Arithmetic on the rule, not legal advice.
Tools (9): list_regimes, explain_rule, classify_event, compute_deadlines, deadline_status, holiday_calendar, compute_deadlines_multi, validate_report, timeline_export.
Free tools: list_regimes, explain_rule, classify_event, compute_deadlines, deadline_status, holiday_calendar. Premium (All-Access license): compute_deadlines_multi, validate_report, timeline_export.
https://mcp.moltlinestudio.com/taxlots
Crypto cost-basis engine: parse Coinbase, Kraken or generic CSV exports, lint the ledger, match transfers between your own wallets, build FIFO/LIFO/HIFO/specific-ID lots per account, lay out Form 8949 rows and diff the broker's 1099-DA. Decimal maths; nothing stored; not tax advice.
Tools (8): parse_transactions, ledger_lint, match_transfers, build_lots, form_8949_rows, reconcile_1099da, wash_window_check, lp_position_math.
Free tools: parse_transactions, ledger_lint, match_transfers, wash_window_check, lp_position_math. Premium (All-Access license): build_lots, form_8949_rows, reconcile_1099da.
https://mcp.moltlinestudio.com/optimize
Operations research with Google OR-Tools: capacitated and time-windowed vehicle routing, 3-D bin and pallet packing, 1-D and 2-D cutting stock with kerf, shift rostering and multi-constraint knapsack. Inputs validated first, solve time bounded, solver status reported honestly.
Tools (11): route_plan, route_plan_fleet, distance_matrix_haversine, pack_bins, pack_bins_large, cutting_stock_1d, cutting_stock_2d, roster_shifts, knapsack_select, validate_problem, explain_solution.
Free tools: route_plan, distance_matrix_haversine, pack_bins, cutting_stock_1d, knapsack_select, validate_problem, explain_solution. Premium (All-Access license): route_plan_fleet, pack_bins_large, cutting_stock_2d, roster_shifts.
https://mcp.moltlinestudio.com/outbound
Sales outreach: sequences, personalization, and reply drafting for outbound motions.
Tools (8): list_products, get_free_skill, audit_copy, get_full_product, get_full_skill, sequence_planner, subject_line_scorer, utm_builder.
Free tools: list_products, get_free_skill, audit_copy, sequence_planner, subject_line_scorer, utm_builder. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/personal
Personal productivity: planning, routines, and life admin, run through your agent.
Tools (9): list_products, get_free_skill, budget_split, spaced_repetition_plan, get_full_product, get_full_skill, savings_goal, tip_split, countdown_days.
Free tools: list_products, get_free_skill, budget_split, spaced_repetition_plan, savings_goal, tip_split, countdown_days. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/research
Research support: citations, summaries, and source organization for serious research work.
Tools (8): list_products, get_free_skill, format_citation, get_full_product, get_full_skill, stats_describe, sample_size, confidence_interval.
Free tools: list_products, get_free_skill, format_citation, stats_describe, sample_size, confidence_interval. Premium (All-Access license): get_full_product, get_full_skill.
https://mcp.moltlinestudio.com/skillmd-lint
SKILL.md quality tooling: validate, lint, and improve agent skill files before you ship them.
Tools (6): lint_skill, packaging_check, regex_test, json_validate, diff_texts, cron_explain.
Free tier available; premium tools unlock with the Moltline All-Access license.
Ninety-two tools across the fleet are free forever — not
free for fourteen days, not free until the pricing page changes. The free tier is
the front door and it stays open. One All-Access license at $19/month unlocks the
premium tools on every server, and that single license funds the whole fleet. The
license is checked server-side on every premium call, carries no account with it,
and simply stops unlocking things if you cancel. Settled in cryptocurrency. And if you are an
agent rather than a person, /api will quote you a price you can
settle in USDC on Base with no human in the loop.
Fair question — you are pointing your agent at someone else's endpoint. Three answers, all of which you can check without asking us.
MCPize audits MCP servers across seven dimensions and publishes the result at a URL anyone can open. Ours on the catalog endpoint: A, 94/100, scanned 5 September 2026. All 22 endpoints are listed on MCPize and in the open MCP Registry, and every one publishes a server card you can fetch.
The free tier asks you for nothing. No credentials to steal, no account to compromise. The servers are stateless calculators and analyzers — your data is not stored.
An api-catalog, a server card per endpoint, an agent-skills index with sha256 digests, and every agent protocol documented. Scan the domain with whatever tool you trust.
The things people ask before they paste a URL.
No. Any client that speaks MCP Streamable HTTP takes the same URL, so the configuration is identical in Claude Desktop, Claude Code, Cursor and Codex CLI. Clients that only speak stdio use the open-source bridge: python moltline_mcp.py timeops.
The tool says so plainly and points at the license page. Nothing breaks and nothing silently returns an empty result - the free tools on that server keep working exactly as before.
Fair use. If you are building something that needs real volume, email support@moltlinestudio.com and we will sort it out.
Servers give an agent tools; skills teach an agent workflows. The skills are SKILL.md playbooks that pair with these servers, free on GitHub and cataloged at moltlinestudio.com/skills.html.