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The Neuron MCP server costs 66,028 tokens before the first call.

Every request your agent makes carries every tool definition this server exposes — context your code, documents and conversation can't use, mostly for tools the agent never calls. You don't need them all in the window, and you don't have to pay for them.

QUICK ANSWER The Neuron MCP server's 401 tool definitions consume 66,028 tokens — 33% of a 200k context window, and 35× the median MCP server (1,866 tokens). A scoped grant exposing only the tools you use cuts that roughly in proportion.

MEASURED FROM SCHEMAS tiktoken o200k_base · rank #42 of 12,801 measured servers · refreshed every build Method →

What that costs before your agent starts working.

Tool definitions are overhead: they occupy context on every request and compete with your code, documents and conversation history for the same window.

200K WINDOW 33%
1M WINDOW 6.6%

Corpus context: Neuron ranks #42 of 12,801 measured MCP servers by definition cost. The median is 1,866 tokens, p90 is 13,646, and the heaviest (Ainumbers Mcp Apps) is 442,891 — 221% of a 200k window on its own. New to this? See MCP token cost and context window in the glossary.

Where the 66,028 tokens go.

Each row is one tool definition as a tools/list entry — name, description and input schema — counted with o200k_base. Average: 165 tokens per tool.

ToolCategoryTokens% of server
neuron_create_list_campaign Write 1,409 2.1%
neuron_create_product Write 1,370 2.1%
neuron_update_product Write 1,322 2.0%
neuron_update_list_campaign Write 1,182 1.8%
neuron_create_flow Write 1,095 1.7%
neuron_create_blog_post Write 861 1.3%
neuron_update_blog_post Write 757 1.1%
neuron_create_broadcast Write 731 1.1%
neuron_create_tool Write 718 1.1%
neuron_create_event Write 624 0.9%
neuron_update_bot Write 619 0.9%
neuron_request_approval Read 598 0.9%
neuron_update_flow Write 597 0.9%
neuron_webagent_run Execute 594 0.9%
neuron_create_bot Write 592 0.9%
neuron_update_tool Write 592 0.9%
neuron_sites_publish Write 591 0.9%
neuron_create_task Write 509 0.8%
neuron_create_sms_campaign Write 492 0.7%
neuron_sites_set_access Write 478 0.7%
neuron_send_whatsapp Write 457 0.7%
neuron_create_group Write 443 0.7%
neuron_compose_message Write 431 0.7%
neuron_studio_apply Write 401 0.6%
neuron_update_task Write 400 0.6%
neuron_enroll_members Read 396 0.6%
neuron_create_event_type Write 381 0.6%
neuron_update_ad_request Write 377 0.6%
neuron_get_flow_catalog Read 366 0.6%
neuron_clear_chat Destructive 332 0.5%
neuron_build_persona_from_text Execute 330 0.5%
neuron_ingest_knowledge Write 313 0.5%
neuron_create_ad_request Financial 308 0.5%
neuron_submit_to_list_pool Write 299 0.5%
neuron_create_lead_source Write 294 0.4%
neuron_post_to_status Destructive 291 0.4%
neuron_bot_api_send Write 290 0.4%
neuron_publish_to_pool Write 290 0.4%
neuron_add_group_members Write 287 0.4%
neuron_update_event Write 286 0.4%
neuron_remove_group_members Destructive 282 0.4%
neuron_studio_make Execute 277 0.4%
neuron_create_campaign Write 270 0.4%
neuron_clear_media Destructive 267 0.4%
neuron_update_contact Write 266 0.4%
neuron_update_pool_item Write 262 0.4%
neuron_studio_agent Execute 260 0.4%
neuron_create_calendar Write 260 0.4%
neuron_create_outbound_webhook Write 259 0.4%
neuron_build_persona_from_conversation Execute 255 0.4%
neuron_send_sticker Write 251 0.4%
neuron_create_contact Write 244 0.4%
neuron_sites_update Write 240 0.4%
neuron_update_availability Write 232 0.4%
neuron_update_campaign Write 231 0.3%
neuron_create_contact_list Write 228 0.3%
neuron_studio_voiceover Read 223 0.3%
neuron_update_calendar Write 223 0.3%
neuron_update_event_type Write 221 0.3%
neuron_browse_pool Read 220 0.3%
neuron_respond_approval Read 220 0.3%
neuron_update_storefront Write 218 0.3%
neuron_update_contact_list Write 217 0.3%
neuron_create_channel Write 216 0.3%
neuron_send_poll Write 210 0.3%
neuron_set_override Write 210 0.3%
neuron_list_contacts Read 209 0.3%
neuron_merge_contact_lists Write 209 0.3%
neuron_update_kb_entry Write 207 0.3%
neuron_update_outbound_webhook Write 207 0.3%
neuron_browse_list_pool Read 206 0.3%
neuron_import_contacts Write 205 0.3%
neuron_create_kb_entry Write 204 0.3%
neuron_update_privacy_setting Write 204 0.3%
neuron_create_webhook Write 203 0.3%
neuron_update_group_members Write 202 0.3%
neuron_list_blog_posts Read 201 0.3%
neuron_update_scheduled_message Write 199 0.3%
neuron_add_to_contact_list Write 197 0.3%
neuron_build_persona Execute 193 0.3%
neuron_install_from_pool Write 192 0.3%
neuron_extract_leads Read 189 0.3%
neuron_list_approvals Read 187 0.3%
neuron_post_to_newsletter Destructive 186 0.3%
neuron_bulk_toggle_builtin_tools Write 186 0.3%
neuron_list_bookings Read 186 0.3%
neuron_toggle_builtin_tool Write 186 0.3%
neuron_invite_member Write 185 0.3%
neuron_update_organization Write 185 0.3%
neuron_get_collection_items Read 183 0.3%
neuron_run_flow Execute 181 0.3%
neuron_generate_from_persona Write 181 0.3%
neuron_rewrite_text Read 179 0.3%
neuron_update_whatsapp_credentials Write 179 0.3%
neuron_list_audit_logs Read 178 0.3%
neuron_list_whatsapp_templates Read 177 0.3%
neuron_create_social_channel Write 177 0.3%
neuron_bot_api_chat Execute 176 0.3%
neuron_create_api_key Write 175 0.3%
neuron_draft_task Read 174 0.3%
neuron_save_bank_account Financial 173 0.3%
neuron_studio_save Write 173 0.3%
neuron_studio_transform_video Execute 172 0.3%
neuron_send_reaction Write 172 0.3%
neuron_upload_media Write 170 0.3%
neuron_update_channel Write 169 0.3%
neuron_bot_api_list_conversations Read 168 0.3%
neuron_handle_join_requests Write 167 0.3%
neuron_bot_api_get_messages Read 166 0.3%
neuron_list_kb_entries Read 166 0.3%
neuron_send_contact_card Write 166 0.3%
neuron_download_media Read 165 0.2%
neuron_update_broadcast Write 165 0.2%
neuron_update_group_settings Write 164 0.2%
neuron_studio_upload_media Write 163 0.2%
neuron_get_broadcast_recipients Read 161 0.2%
neuron_studio_render Read 161 0.2%
neuron_send_location Write 160 0.2%
neuron_studio_generate_image Write 160 0.2%
neuron_get_contact_list_members Read 157 0.2%
neuron_sites_duplicate Write 157 0.2%
neuron_update_webhook Write 157 0.2%
neuron_list_conversations Read 155 0.2%
neuron_team_availability Read 155 0.2%
neuron_register Write 155 0.2%
neuron_get_approval Read 153 0.2%
neuron_list_contact_lists Read 153 0.2%
neuron_product_members Read 153 0.2%
neuron_send_message Write 152 0.2%
neuron_semantic_search_contacts Read 151 0.2%
neuron_sites_respond_access_request Read 149 0.2%
neuron_list_scheduled_messages Read 146 0.2%
neuron_add_tool_secret Write 146 0.2%
neuron_sites_delete_version Destructive 145 0.2%
neuron_set_group_join_approval Write 144 0.2%
neuron_get_available_slots Read 143 0.2%
neuron_list_sms_campaigns Read 143 0.2%
neuron_attach_knowledge_base Write 142 0.2%
neuron_forward_message Write 142 0.2%
neuron_list_broadcasts Read 139 0.2%
neuron_list_campaigns Read 139 0.2%
neuron_upload_document Write 139 0.2%
neuron_list_flow_runs Read 137 0.2%
neuron_list_events Read 136 0.2%
neuron_list_ad_requests Read 135 0.2%
neuron_list_newsletters Read 135 0.2%
neuron_create_newsletter Write 135 0.2%
neuron_studio_import_media_url Write 135 0.2%
neuron_delete_event Destructive 134 0.2%
neuron_get_task_runs Read 134 0.2%
neuron_cancel_approval Destructive 133 0.2%
neuron_fund_wallet Financial 133 0.2%
neuron_set_default_channel Write 133 0.2%
neuron_studio_generate_video Write 132 0.2%
neuron_update_group_subject Write 132 0.2%
neuron_update_member Write 132 0.2%
neuron_request_pair_code Execute 131 0.2%
neuron_set_presence Execute 131 0.2%
neuron_update_group_description Write 131 0.2%
neuron_get_business_profile Read 130 0.2%
neuron_get_channel_events Read 130 0.2%
neuron_get_outbound_webhook_logs Read 130 0.2%
neuron_webagent_list_runs Read 130 0.2%
neuron_switch_instance Write 130 0.2%
neuron_update_knowledge_base Write 130 0.2%
neuron_update_social_channel Write 129 0.2%
neuron_wallet_transactions Read 128 0.2%
neuron_apply_persona_to_bot Write 128 0.2%
neuron_audio_contact Write 127 0.2%
neuron_edit_message Write 127 0.2%
neuron_sites_delete Destructive 126 0.2%
neuron_get_webhook_logs Read 126 0.2%
neuron_list_builtin_tools Read 125 0.2%
neuron_remove_from_contact_list Write 124 0.2%
neuron_block_contact Write 124 0.2%
neuron_add_product_codes Write 124 0.2%
neuron_mark_as_read Write 124 0.2%
neuron_send_campaign_message Write 124 0.2%
neuron_studio_rehost_media Read 123 0.2%
neuron_update_persona Write 123 0.2%
neuron_get_messages Read 122 0.2%
neuron_list_reflections Read 122 0.2%
neuron_unassign_bot_from_social_channel Destructive 121 0.2%
neuron_revoke_api_key Destructive 120 0.2%
neuron_verify_bank_account Financial 120 0.2%
neuron_duplicate_product Destructive 119 0.2%
neuron_remove_tool_secret Destructive 119 0.2%
neuron_get_group_participants Read 119 0.2%
neuron_assign_bot_to_social_channel Write 119 0.2%
neuron_get_group_invite_link Read 117 0.2%
neuron_get_flow_run Read 116 0.2%
neuron_search_knowledge Read 116 0.2%
neuron_studio_transcribe Read 116 0.2%
neuron_send_sms_campaign Write 116 0.2%
neuron_leave_group Destructive 115 0.2%
neuron_revoke_group_invite Destructive 115 0.2%
neuron_add_bot_channel Write 115 0.2%
neuron_update_newsletter Write 115 0.2%
neuron_create_knowledge_base Write 114 0.2%
neuron_list_overrides Read 113 0.2%
neuron_request_payout Financial 113 0.2%
neuron_remove_bot_channel Destructive 112 0.2%
neuron_revoke_invitation Destructive 112 0.2%
neuron_detach_knowledge_base Write 111 0.2%
neuron_remove_member Destructive 111 0.2%
neuron_join_campaign Write 111 0.2%
neuron_list_leads Read 111 0.2%
neuron_test_tool Execute 111 0.2%
neuron_fund_ad_request Financial 110 0.2%
neuron_my_participations Read 110 0.2%
neuron_convert_lead Write 110 0.2%
neuron_assign_bot_to_channel Write 109 0.2%
neuron_campaign_marketplace Read 108 0.2%
neuron_list_payouts Read 108 0.2%
neuron_reschedule_booking Read 105 0.2%
neuron_webagent_get_run Read 105 0.2%
neuron_estimate_sms_campaign Read 104 0.2%
neuron_sites_get_access_requests Read 104 0.2%
neuron_update_profile_picture Write 104 0.2%
neuron_delete_message Destructive 103 0.2%
neuron_list_tasks Read 102 0.2%
neuron_submit_ad_request Write 102 0.2%
neuron_list_whatsapp_contacts Read 101 0.2%
neuron_studio_catalog Read 101 0.2%
neuron_studio_render_status Read 101 0.2%
neuron_start_channel_session Execute 100 0.2%
neuron_delete_contact_list Destructive 99 0.1%
neuron_webagent_kill Execute 99 0.1%
neuron_refresh_contact_list Execute 99 0.1%
neuron_deliver_order Write 98 0.1%
neuron_pull_pool_update Write 98 0.1%
neuron_delete_kb_entry Destructive 97 0.1%
neuron_stop_ad_request Destructive 97 0.1%
neuron_update_profile_name Write 97 0.1%
neuron_update_profile_status Write 97 0.1%
neuron_sync_newsletters Write 96 0.1%
neuron_cancel_scheduled_message Destructive 95 0.1%
neuron_list_api_keys Read 95 0.1%
neuron_run_list_campaign_now Execute 94 0.1%
neuron_takeover_conversation Execute 94 0.1%
neuron_toggle_flow Read 94 0.1%
neuron_checkout Financial 94 0.1%
neuron_resume_ad_request Write 94 0.1%
neuron_studio_generate_video_status Write 94 0.1%
neuron_studio_transform_video_status Execute 93 0.1%
neuron_webagent_stop Execute 93 0.1%
neuron_get_ad_request_analytics Read 93 0.1%
neuron_list_outbound_webhooks Read 93 0.1%
neuron_unblock_contact Write 93 0.1%
neuron_unassign_bot_from_channel Write 92 0.1%
neuron_get_privacy_settings Read 92 0.1%
neuron_delete_tool Destructive 91 0.1%
neuron_send_broadcast Destructive 91 0.1%
neuron_stop_channel_session Execute 91 0.1%
neuron_pause_ad_request Write 91 0.1%
neuron_sites_rollback Read 91 0.1%
neuron_delete_ad_request Destructive 90 0.1%
neuron_stop_campaign Destructive 90 0.1%
neuron_unpublish_from_pool Destructive 90 0.1%
neuron_get_channel_qr Read 90 0.1%
neuron_get_pool_item Read 90 0.1%
neuron_refresh_newsletter Read 90 0.1%
neuron_search_contacts Read 90 0.1%
neuron_toggle_featured Write 90 0.1%
neuron_delete_outbound_webhook Destructive 89 0.1%
neuron_get_bot_analytics Read 89 0.1%
neuron_get_list_campaign Read 89 0.1%
neuron_release_conversation Write 89 0.1%
neuron_sync_reflections Write 89 0.1%
neuron_delete_webhook Destructive 88 0.1%
neuron_get_blog_post Read 88 0.1%
neuron_get_eligible_contacts Read 88 0.1%
neuron_validate_social_channel Read 88 0.1%
neuron_webagent_command_history Read 88 0.1%
neuron_switch_org Write 88 0.1%
neuron_delete_campaign Destructive 87 0.1%
neuron_delete_newsletter Destructive 87 0.1%
neuron_fund_campaign Financial 87 0.1%
neuron_get_channel_status Read 87 0.1%
neuron_get_contact_list Read 87 0.1%
neuron_list_webhooks Read 87 0.1%
neuron_pause_bot Execute 87 0.1%
neuron_submit_campaign Write 87 0.1%
neuron_delete_social_channel Destructive 86 0.1%
neuron_start_social_channel_session Execute 86 0.1%
neuron_get_ad_request Read 86 0.1%
neuron_get_social_channel_status Read 86 0.1%
neuron_list_tools Read 86 0.1%
neuron_close_conversation Write 86 0.1%
neuron_publish_blog_post Write 86 0.1%
neuron_get_scheduled_message Read 85 0.1%
neuron_get_social_channel Read 85 0.1%
neuron_list_invitations Read 85 0.1%
neuron_approve_reflection Write 85 0.1%
neuron_delete_channel Destructive 84 0.1%
neuron_delete_contact Destructive 84 0.1%
neuron_stop_social_channel_session Execute 84 0.1%
neuron_bot_api_get_bot Read 84 0.1%
neuron_campaign_participants Read 84 0.1%
neuron_get_broadcast Read 84 0.1%
neuron_get_organization Read 84 0.1%
neuron_pause_campaign Write 84 0.1%
neuron_pause_sms_campaign Read 84 0.1%
neuron_refresh_token Write 84 0.1%
neuron_sites_check_label Read 84 0.1%
neuron_reject_reflection Write 84 0.1%
neuron_cancel_booking Destructive 83 0.1%
neuron_delete_blog_post Destructive 83 0.1%
neuron_delete_flow_run Destructive 83 0.1%
neuron_delete_list_campaign Destructive 83 0.1%
neuron_refund_order Financial 83 0.1%
neuron_verify_wallet_funding Financial 83 0.1%
neuron_delete_bot Destructive 82 0.1%
neuron_delete_broadcast Destructive 82 0.1%
neuron_sync_knowledge Execute 82 0.1%
neuron_get_channel Read 82 0.1%
neuron_get_flow Read 82 0.1%
neuron_get_newsletter Read 82 0.1%
neuron_list_bot_channels Read 82 0.1%
neuron_list_bot_knowledge_bases Read 82 0.1%
neuron_find_contact_lists_for_contact Read 81 0.1%
neuron_get_blocklist Read 81 0.1%
neuron_get_campaign Read 81 0.1%
neuron_sites_get Read 81 0.1%
neuron_login Write 81 0.1%
neuron_update_booking_notes Write 81 0.1%
neuron_cancel_flow_run Destructive 80 0.1%
neuron_delete_flow Destructive 80 0.1%
neuron_get_conversation Read 80 0.1%
neuron_list_list_campaigns Read 80 0.1%
neuron_list_members Read 80 0.1%
neuron_apply_to_sell Write 80 0.1%
neuron_delete_knowledge_base Destructive 79 0.1%
neuron_run_task Execute 79 0.1%
neuron_get_bot Read 79 0.1%
neuron_get_contact Read 79 0.1%
neuron_list_channel_groups Read 79 0.1%
neuron_pause_list_campaign Read 79 0.1%
neuron_delete_sms_campaign Destructive 78 0.1%
neuron_remove_profile_picture Destructive 78 0.1%
neuron_toggle_task Execute 78 0.1%
neuron_resume_list_campaign Write 78 0.1%
neuron_run_lead_source Execute 77 0.1%
neuron_list_kb_bots Read 77 0.1%
neuron_resume_bot Execute 77 0.1%
neuron_delete_task Destructive 75 0.1%
neuron_get_product Read 75 0.1%
neuron_list_personas Read 75 0.1%
neuron_resume_campaign Execute 75 0.1%
neuron_delete_calendar Destructive 74 0.1%
neuron_storage_job Destructive 74 0.1%
neuron_get_availability Read 74 0.1%
neuron_get_knowledge_base Read 74 0.1%
neuron_get_sms_campaign Read 74 0.1%
neuron_google_calendar_status Read 74 0.1%
neuron_list_flows Read 74 0.1%
neuron_complete_booking Write 73 0.1%
neuron_webagent_open_launcher Write 73 0.1%
neuron_delete_override Destructive 72 0.1%
neuron_delete_product Destructive 72 0.1%
neuron_logout Destructive 72 0.1%
neuron_sites_list Read 72 0.1%
neuron_resume_sms_campaign Write 72 0.1%
neuron_confirm_booking Read 71 0.1%
neuron_mark_no_show Write 71 0.1%
neuron_delete_event_type Destructive 70 0.1%
neuron_get_persona Read 70 0.1%
neuron_get_collection Read 68 0.1%
neuron_google_calendar_disconnect Write 67 0.1%
neuron_get_calendar Read 66 0.1%
neuron_get_event_type Read 66 0.1%
neuron_list_collections Read 65 0.1%
neuron_list_event_types Read 65 0.1%
neuron_sync_whatsapp_contacts Write 65 0.1%
neuron_get_booking Read 63 0.1%
neuron_get_storefront Read 63 0.1%
neuron_list_orders Read 63 0.1%
neuron_whoami Read 63 0.1%
neuron_delete_persona Destructive 62 0.1%
neuron_populate_contacts Write 62 0.1%
neuron_seller_status Read 62 0.1%
neuron_storage_summary Read 62 0.1%
neuron_list_reviews Read 61 0.1%
neuron_list_channels Read 59 0.1%
neuron_list_social_channels Read 59 0.1%
neuron_cancel_subscription Financial 58 0.1%
neuron_get_billing Read 58 0.1%
neuron_get_profile Read 58 0.1%
neuron_list_products Read 58 0.1%
neuron_list_bots Read 57 0.1%
neuron_list_organizations Read 57 0.1%
neuron_get_bank_account Read 56 0.1%
neuron_sales_stats Read 56 0.1%
neuron_wallet_balance Read 56 0.1%
neuron_list_installed Read 55 0.1%
neuron_list_published Read 55 0.1%
neuron_list_knowledge_bases Read 54 0.1%
neuron_export_contacts Read 53 0.1%
neuron_list_calendars Read 52 0.1%
neuron_list_lead_sources Read 51 0.1%
neuron_lead_stats Read 48 0.1%

Your agent uses a handful of these tools. It pays for all 401.

You don't need all 401 of those definitions in the window. PolicyLayer is an MCP gateway that sits in front of Neuron: only the tools you grant are exposed to the agent, the rest never load. A smaller window means a sharper agent — less noise when it picks a tool — and every request costs less:

Grant scopeDefinition costReduction
All 401 tools (no gateway) 66,028 tokens —
3 granted tools ~494 tokens −99%
5 granted tools ~823 tokens −99%
10 granted tools ~1,647 tokens −98%

The risk dividend: 65 of these 401 tools are critical-risk (destructive or financial) and cost 7,312 tokens (11% of the definition load). Block them — the recommended starter policy — and you reclaim that context before tuning anything else.

  1. Create a free account and register Neuron — nothing to install.
  2. Grant only the tools you use — ungranted definitions never enter the context window.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
CUT NEURON TOKEN COST →

Instant setup, no code required.

Neuron token-cost questions.

How many tokens does the Neuron MCP server use?+

Its 401 tool definitions total 66,028 tokens — 33% of a 200k context window — measured with tiktoken o200k_base over the serialised tools/list payload. Exact counts vary slightly by client and model.

Why does Neuron consume tokens before I send a message?+

MCP clients load every connected server's tool definitions — name, description, and input schema — into the model's context so it knows what it can call. That payload is charged against your context window on every request, whether or not a tool is used.

How do I reduce Neuron's token usage?+

Expose fewer tools. A PolicyLayer grant scopes Neuron to only the tools you allow — ungranted definitions are filtered out of the tool list, so they never enter the context window. A grant of 3 typical tools costs roughly 494 tokens, a 99% reduction.

Does deferred tool loading fix this?+

Partially, in some clients. Claude Code defers MCP tool schemas behind a tool-search step by default, and VS Code has experimental grouping — but you still pay tokens per search and reload, and Cursor, Windsurf and Gemini CLI load definitions upfront. Reducing the exposed tool set cuts the cost in every client.

How these numbers were measured.

01
Serialisation

Each tool is serialised as a tools/list entry — name, description, input schema — from the schemas in the PolicyLayer scan database. Clients differ slightly in framing, so treat counts as close estimates.

02
Tokeniser

tiktoken o200k_base (GPT-4o/o-series). Anthropic's current tokeniser isn't published, so Claude's exact counts will differ; for English text and JSON schemas the totals are close enough to treat these as estimates.

03
Deferred loading

Some clients now defer schema loading (Claude Code's tool search; VS Code experimental grouping). You still pay per search and reload — and Cursor, Windsurf and Gemini CLI load everything upfront.

Computed 21-10-2026 from the PolicyLayer scan database over all 401 catalogued Neuron tools. Counts refresh with every site build.

Expose only the tools you use — the rest never enter your context.

A PolicyLayer grant scopes Neuron to the tools you actually allow. Ungranted definitions never load, and every call that does run is checked against policy first.

Instant setup, no code required.

46,500+ MCP servers and 515,000+ tools scanned and risk-classified.

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