Apollo.io
REMOTE · MCP.APOLLO.IO
Prospect, enrich leads, and manage outreach sequences with Apollo.io.
Available components
Last scanned (8 hours ago)
Scores higher than 35% of remote servers
Reachable. Last reached 5 Nov 2026.
Category CRM and Sales
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security97
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- The endpoint enforces authorisation, advertised via RFC 9728 protected-resource metadata. View diagnostics → Pass
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server supports Client ID Metadata Documents, the current MCP client-registration mechanism. View diagnostics → Pass
Transport & Reachability0
- Transport blocked by authentication: the endpoint requires auth we don't have to verify streamable-http. See how to fix → View diagnostics → Unverified
Schema Quality & AI Usability0
- Schema blocked by authentication: the endpoint requires auth we don't have to read it. See how to fix → Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Tool Safety0
- Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Capabilities0
- Capabilities blocked by authentication: the endpoint requires auth we don't have to read them. See how to fix → Unverified
Unverified: 6 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm. Claim this server and supply a read-only token to verify it and lift the score.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 31 Oct 26 +1
- Authorization: partial → pass ▲ security
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 5 Sept 26 0
- HSTS header: fail → pass ▲ security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.apollo.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=apollo.io | CN=YE1,O=Let's Encrypt,C=US | 9 Oct 2026 | 7 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 6dd107ef98e228631f548b53ef95ee66c70 |
| SANs: *.apollo.io, apollo.io | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.apollo.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690 | 8 | Verified |
| apollo.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On connection |
| HTTP status | 401 |
WWW-Authenticate challenge Bearer realm="Apollo.io", resource_metadata="https://mcp.apollo.io/.well-known/oauth-protected-resource", scope="read_user_profile app_scopes people_bulk_match organizations_bulk_enrich organizations_enrich people_match webhook_result_read mixed_people_api_search organizations_job_posting mixed_companies_search organizations_search contact_write contact_update contacts_search contact_read contacts_deduplicate account_write account_update context_center_read context_center_write emailer_campaigns_search emailer_campaigns_create emailer_campaigns_update emailer_campaigns_approve emailer_campaigns_add_contact_ids emailer_campaigns_remove_or_stop_contact_ids emailer_schedules_list emailer_messages_search emailer_messages_create emailer_messages_send_now emailer_messages_email_send_status emailer_messages_get_content emailer_campaigns_activity_feed report_sync agent_task email_accounts_list custom_objects_write custom_objects_read custom_field_write opportunity_write opportunities_list opportunity_read tasks_creat
Bearer realm="Apollo.io", resource_metadata="https://mcp.apollo.io/.well-known/oauth-protected-resource", scope="read_user_profile app_scopes people_bulk_match organizations_bulk_enrich organizations_enrich people_match webhook_result_read mixed_people_api_search organizations_job_posting mixed_companies_search organizations_search contact_write contact_update contacts_search contact_read contacts_deduplicate account_write account_update context_center_read context_center_write emailer_campaigns_search emailer_campaigns_create emailer_campaigns_update emailer_campaigns_approve emailer_campaigns_add_contact_ids emailer_campaigns_remove_or_stop_contact_ids emailer_schedules_list emailer_messages_search emailer_messages_create emailer_messages_send_now emailer_messages_email_send_status emailer_messages_get_content emailer_campaigns_activity_feed report_sync agent_task email_accounts_list custom_objects_write custom_objects_read custom_field_write opportunity_write opportunities_list opportunity_read tasks_creat| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| content-security-policy | frame-ancestors 'self' chrome-extension://alhgpfoeiimagjlnfekdhkjlkiomcapa chrome-extension://ececkagaccnfmkopaiemklekhoimmgpn *.salesforce.com *.lightning.force.com; report-uri https://o101058.ingest.us.sentry.io/api/222018/security/?sentry_key=86bb17dd8c2449719dd6b498f3431191&sentry_environment=production&sentry_release=8be9e27c6a4719b785f6c1da57562453426c127f |
| x-content-type-options | nosniff |
| x-frame-options | ALLOWALL |
| www-authenticate | Bearer realm="Apollo.io", resource_metadata="https://mcp.apollo.io/.well-known/oauth-protected-resource", scope="read_user_profile app_scopes people_bulk_match organizations_bulk_enrich organizations_enrich people_match webhook_result_read mixed_people_api_search organizations_job_posting mixed_companies_search organizations_search contact_write contact_update contacts_search contact_read contacts_deduplicate account_write account_update context_center_read context_center_write emailer_campaigns_search emailer_campaigns_create emailer_campaigns_update emailer_campaigns_approve emailer_campaigns_add_contact_ids emailer_campaigns_remove_or_stop_contact_ids emailer_schedules_list emailer_messages_search emailer_messages_create emailer_messages_send_now emailer_messages_email_send_status emailer_messages_get_content emailer_campaigns_activity_feed report_sync agent_task email_accounts_list custom_objects_write custom_objects_read custom_field_write opportunity_write opportunities_list opportunity_read tasks_creat |
Protected resource metadata
| Document | https://mcp.apollo.io/.well-known/oauth-protected-resource |
|---|---|
| Retrieved | Yes |
| Resource | https://mcp.apollo.io/mcp |
| Authorisation server | https://mcp.apollo.io |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.apollo.io/mcp | Auth required | 401 | |
| http (plaintext) | http://mcp.apollo.io/mcp | HTTPS enforced | 301 | https://mcp.apollo.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
No tool schema has been captured from this endpoint yet.
How do I install the Apollo.io MCP server?
Apollo.io is a hosted endpoint at https://mcp.apollo.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.apollo.io
claude mcp add --transport http apolloio-apollo-mcp 'https://mcp.apollo.io/mcp'
What is the Apollo.io MCP server?
Apollo.io is an MCP server listed in the public MCP registry as io.github.apolloio/apollo-mcp. Prospect, enrich leads, and manage outreach sequences with Apollo.io. This page covers its hosted endpoint (https://mcp.apollo.io/mcp).
Is the Apollo.io MCP server safe to use?
Apollo.io scores 39 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
Does the Apollo.io MCP server require authentication?
Yes. Apollo.io asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Apollo.io MCP server still maintained?
Apollo.io is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.