PublicAPIs.io
REMOTE · PUBLICAPIS.IO
Search 1,500+ public APIs with docs, code and auth/free-tier filters; list or sponsor your API.
Available components
Last scanned (10 hours ago)
Scores higher than 46% of remote servers
Reachable. Last reached 18 Oct 2026.
Category Search and Retrieval
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 Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 2 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- 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
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability64
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 734 tokens (~91/item across 8 items; 8 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
- Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage76
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 29% of tool parameters carry a description.Partial
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_message" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
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.
- 18 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Oct 26 0
- MCP protocol: Implements a current MCP spec version (2026-07-28). functional
- MCP protocol version: 2025-11-25 → 2026-07-28 functional
- Server version: 1.0.0 → 1.1.0 functional
- 16 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 15 Oct 26 61
First indexed and scored.
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 18 Oct 2026 · Probed https://publicapis.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.publicapis.io | CN=YE2,O=Let's Encrypt,C=US | 12 Oct 2026 | 10 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 590dc6b040be6cfa6e294213007a203723f |
| SANs: *.publicapis.io, publicapis.io | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| 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 publicapis.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| publicapis.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://publicapis.io/mcp | Verified | 200 | |
| http (plaintext) | http://publicapis.io/mcp | HTTPS enforced | 301 | https://publicapis.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 →
compare_apis ~51
Compare 2-5 APIs side by side (auth, free tier, HTTPS, pricing, docs summary) to choose one. Pass slugs from search_apis.
| Name | Type | Req | Description |
|---|---|---|---|
| slugs | array | yes | – |
No output schema declared.
No examples provided.
get_api ~44
Everything about one API by slug (from search_apis): documentation summary, endpoints, auth, pricing and links. Use before writing integration code.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | – |
No output schema declared.
No examples provided.
get_deal ~61
Status of a deal: negotiating, agreed, awaiting_approval, awaiting_payment (payment_url is included), publishing, live (live_url), rejected. Also returns the last messages.
| Name | Type | Req | Description |
|---|---|---|---|
| deal_id | string | yes | – |
| deal_key | string | yes | – |
No output schema declared.
No examples provided.
get_quickstart ~60
Ready-to-run example code for calling an API, in javascript, python or curl. Use when you are about to integrate an API into code. Verified samples are marked verified=true.
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | – | – |
| slug | string | yes | – |
No output schema declared.
No examples provided.
list_offerings ~34
Ways to get an API listed or sponsored on PublicAPIs.io, with fixed prices, current sponsorship availability and the rules.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
search_apis ~208
Find a public API or data source for a task: use this whenever the user (or your code) needs an API, dataset or third-party service, e.g. weather, geocoding, payments, sports scores, crypto prices, jobs, LLMs. Searches 1,500+ APIs on PublicAPIs.io and returns name, description, category, link and signals (auth: none/api_key/oauth, free_tier, https). Filter with auth="none" for APIs that need no key, free=true, https=true.
| Name | Type | Req | Description |
|---|---|---|---|
| auth | string | – | Only APIs with this authentication. "none" = no key needed. |
| category | string | – | Optional category name or id, e.g. "Weather", "finance". |
| free | boolean | – | Only APIs with a free tier. |
| https | boolean | – | Only APIs served over HTTPS. |
| limit | integer | – | – |
| query | string | – | What the API should do, in plain words. |
No output schema declared.
No examples provided.
send_message ~50
Reply to the broker in an open deal. Returns the broker's answer and the deal status.
| Name | Type | Req | Description |
|---|---|---|---|
| deal_id | string | yes | – |
| deal_key | string | yes | – |
| message | string | yes | – |
No output schema declared.
No examples provided.
start_deal ~138
Open a conversation with the PublicAPIs.io broker agent to list or sponsor an API. Say what you want in plain language and include the API name, website and a contact email if you have them. Returns deal_id and deal_key (keep both; they are needed to continue) and the broker's reply. Every deal is approved by a person before payment.
| Name | Type | Req | Description |
|---|---|---|---|
| api_name | string | – | – |
| company | string | – | – |
| contact_email | string | yes | Where approval, payment link and go-live emails are sent. |
| contact_name | string | – | – |
| message | string | yes | – |
| website | string | – | – |
No output schema declared.
No examples provided.
How do I install the PublicAPIs.io MCP server?
PublicAPIs.io is a hosted endpoint at https://publicapis.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 · publicapis.io
claude mcp add --transport http io-publicapis-directory 'https://publicapis.io/mcp'
What is the PublicAPIs.io MCP server?
PublicAPIs.io is an MCP server listed in the public MCP registry as io.publicapis/directory. Search 1,500+ public APIs with docs, code and auth/free-tier filters; list or sponsor your API. This page covers its hosted endpoint (https://publicapis.io/mcp).
Is the PublicAPIs.io MCP server safe to use?
PublicAPIs.io scores 63 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.
What tools does the PublicAPIs.io MCP server expose?
PublicAPIs.io exposes 8 tools: search_apis, get_api, get_quickstart, compare_apis, list_offerings, and 3 more. Their descriptions and schemas cost roughly 646 tokens of context every time the server is loaded.
Does the PublicAPIs.io MCP server require authentication?
No. We connected to PublicAPIs.io without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the PublicAPIs.io MCP server still maintained?
PublicAPIs.io is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.