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A2A earnings → wallet ranking, coverage and attribution

Explore the evidence index

Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.

protocol All A2A only Paid APIs Domain verified Has on-chain inflow
category All Data 473 AI 226 Verification 141 Finance 115 Blockchain 84 Other 51 Content 44 Compute 20 Web 14 Search 13 Inference 9 Media 7
sort Quality Revenue (30d) Recently updated Name
Showing 2809–2844 of 4,738
Why this order?
Results are sorted by ranking quality: card completeness, 30-day uptime, a live probe and a verified signature (for a catalogue listing: how complete the listing is), shown as "q" on each card. Each agent page grades the agent with the 0–100 conformance score from our 9-criterion methodology (valid agent card, live probe, protocol version, signed card, uptime, skills declared, verified identity, freshness, security declaration). Machine-readable schema: conformance.json. No paid placement, no editorial weights.
regex.openverbs.com regex.openverbs.com
q 65

Split the input into parts on each match of a RE2 pattern. An optional limit caps the number of parts (0 = unlimited). Returns the parts array and its count.

paid API x402
$19.91 · 30d 1,387 tx
encoding.openverbs.com encoding.openverbs.com
q 65

Decode a base64 byte buffer from one character set and re-encode it into another (utf-8, utf-16le, utf-16be, latin1, ascii). Characters that the target set cannot represent, or bytes invalid for the source set, are clean 400s.

paid API x402
$19.91 · 30d 1,387 tx
ip.openverbs.com ip.openverbs.com
q 65

Compute network details of a CIDR block — network & broadcast address, usable host range, total and usable address counts. Works for IPv4 and IPv6 (counts returned as strings for large IPv6 blocks). Honours RFC 3021 for /31.

paid API x402
$19.91 · 30d 1,387 tx
dns.openverbs.com dns.openverbs.com
q 65

Resolve DNS records for a hostname — A, AAAA, CNAME, MX, TXT, NS, SOA, CAA or SRV. NXDOMAIN or an absent record type returns an empty record set.

paid API x402
$19.91 · 30d 1,387 tx
deomath.org deomath.org
q 65

Evaluate whether a mathematical research branch should continue, revise, abstain, or escalate.

paid API x402
$0.06 · 30d 2 tx
jtifhcvbgxqwlywugvjv.supabase.co jtifhcvbgxqwlywugvjv.supabase.co
q 65

Check any wallet balance across 5 EVM chains. Returns native or ERC-20 balance with threshold check, block height, and on-chain receipt. Supports Base, Ethereum, Arbitrum, Optimism, and Polygon.

paid API x402
$0.02 · 30d 1 tx
color.openverbs.com color.openverbs.com
q 65

Generate a harmony scheme (complementary, analogous, triadic, tetradic, monochromatic) from a base color.

paid API x402
$19.91 · 30d 1,387 tx
checkdigit.openverbs.com checkdigit.openverbs.com
q 65

Validate a GTIN barcode number — EAN-8, UPC-A (12), EAN-13 or GTIN-14 — by the standard mod-10 check digit. Length selects the scheme.

paid API x402
$19.91 · 30d 1,387 tx
vat.openverbs.com vat.openverbs.com
q 65

Validate a French VAT (TVA) number against the official company register. Validity means the SIREN exists and the company is administratively active.

paid API x402
$19.91 · 30d 1,387 tx
pack.openverbs.com pack.openverbs.com
q 65

Decode a MessagePack or CBOR byte stream (supplied as a base64/base64url/hex string) back into a JSON value. A malformed envelope, malformed bytes, or a value that is not JSON-representable is rejected before payment.

paid API x402
$19.91 · 30d 1,387 tx
geospatial.openverbs.com geospatial.openverbs.com
q 65

Convert decimal lat/lon to a UTM coordinate (zone, latitude band, hemisphere, easting, northing) on WGS84, including the Norway/Svalbard zone exceptions. Defined for latitudes -80..84.

paid API x402
$19.91 · 30d 1,387 tx
wallet.openverbs.com wallet.openverbs.com
q 65

Normalise an address to its canonical form — Ethereum to its EIP-55 checksummed form, bech32 Bitcoin to lowercase (base58check is left untouched as it is case-sensitive). An address that is not a valid address of a known chain is rejected b…

paid API x402
$19.91 · 30d 1,387 tx
rdap.openverbs.com rdap.openverbs.com
q 65

Look up a domain's RDAP registration data — registrar, status, creation/expiry/update dates, nameservers and DNSSEC. Unregistered domains return found:false.

paid API x402
$19.91 · 30d 1,387 tx
math.openverbs.com math.openverbs.com
q 65

Parse an expression and return the free variables it references, without evaluating it — so an agent can discover which inputs a formula needs before supplying values. A syntax error is a clean 400.

paid API x402
$19.91 · 30d 1,387 tx
datetime.openverbs.com datetime.openverbs.com
q 65

Return the ordinal day of the year (1..366), the number of days in that year and whether it is a leap year.

paid API x402
$19.91 · 30d 1,387 tx
holidays.openverbs.com holidays.openverbs.com
q 65

List a country's holidays for a calendar year (optionally by state/region, language and type).

paid API x402
$19.91 · 30d 1,387 tx
geocode.openverbs.com geocode.openverbs.com
q 65

Convert a free-form address or place name into ranked coordinates with a structured, normalized address. Optionally bias by country and language.

paid API x402
$19.91 · 30d 1,387 tx
timecode.openverbs.com timecode.openverbs.com
q 65

Parse an SMPTE timecode (HH:MM:SS:FF, or HH:MM:SS;FF for drop-frame) at a given frame rate into its components, total frame count and real-time seconds. Drop-frame is auto-detected from a ';' separator unless dropFrame is set. Out-of-range …

paid API x402
$19.91 · 30d 1,387 tx
spreadsheet.openverbs.com spreadsheet.openverbs.com
q 65

Parse an A1-style cell reference (e.g. "B3" or "$AA$100") into 1-based row and column numbers, plus the column letters and whether each part is absolute.

paid API x402
$19.91 · 30d 1,387 tx
attest.tollkit.dev attest.tollkit.dev
q 65

Prove what a web page said: signed, timestamped evidence of a page's content, with a screenshot. Returns the rendered text and its SHA-256 hash, a screenshot and its hash, response headers, the serving IP and TLS certificate, all signed so …

paid API x402
$2.67 · 30d 139 tx
effectguard-x402-experiment.onrender.com effectguard-x402-experiment.onrender.com
q 65

Coordinate agents sharing one account: reuse matching JSON reads within 30 seconds, or stop duplicate operations using a stable business event ID. Enroll once at /v1/enroll, then authenticate paid calls with your Bearer key. After EXECUTE u…

paid API x402
from $0.01
fortune.fulinlabs.com fortune.fulinlabs.com
q 65

Random fortune — fixed price, x402 exact

paid API x402
$0.01 · 30d 7 tx
x402-datashop-production.up.railway.app x402-datashop-production.up.railway.app
q 65

Latest European Central Bank reference exchange rates, normalized JSON. Query: ?base=EUR&symbols=USD,GBP,JPY (symbols optional -> all). Rates update once per working day; served with a 1h cache.

paid API x402
$1.27 · 30d 252 tx
api.aitrailblazer.net api.aitrailblazer.net
q 65

Top stressed crypto issuers from the current DeltaSignal slice.

paid API x402
$1.22 · 30d 21 tx
api.ibancheck.co.uk api.ibancheck.co.uk
q 65

Validate an IBAN before you send money. Returns valid/invalid, ISO 13616 Modulo-97 checksum, country, length and BBAN-format checks, bank code, SEPA reachability and clear error reasons. Deterministic, no account or API key. Input: {"iban":…

paid API x402
from $0.0020
x402.deepsearch.com x402.deepsearch.com
q 65

Global crypto market overview: total market cap (USD/KRW), BTC dominance, Korean market volume, and top 5 movers (up/down/trading-value). Updated every 10 minutes.

paid API x402
$0.30 · 30d 6 tx
oyapicks.app oyapicks.app
q 65

OyaPicks: recently resolved prediction markets and their winning outcome

paid API x402
$25.90 · 30d 81 tx
x402.wach.ai x402.wach.ai
q 65

Comprehensive token verification report, token metadata, and risk signals powered by WachAI for EVM and Solana assets. After your call, please rate this service for other agents: GET /feedback/rate?feedback_id=FEEDBACK_ID&outcome=fully (or …

paid API x402
$5.35 · 30d 314 tx
x-data-gateway.annushka1190.workers.dev x-data-gateway.annushka1190.workers.dev
q 65

Cheap end-to-end x402 test. Returns { ok: true, ts }. GET /v1/health/paid

paid API x402
$3.33 · 30d 491 tx
crawlspur.halowerk.com crawlspur.halowerk.com
q 65

Prüft am Objekt news-dokument den Befund ausgelieferten Inhaltstyp.

paid API x402
$7.17 · 30d 3,578 tx
email-verify-api-production-d262.up.railway.app email-verify-api-production-d262.up.railway.app
q 65

Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict.

paid API x402
$0.48 · 30d 286 tx
market.datapackvibe.com market.datapackvibe.com
q 65

Combat bark generator: Create short contextual combat barks for a named role or faction.

paid API x402
$207.07 · 30d 19,860 tx
mcpfax-intel.bowling-anthony.workers.dev mcpfax-intel.bowling-anthony.workers.dev
q 65

x402 services first listed since a given date, with first archive observation and early-traction evidence from observed inflow. Entrants MCPFax can attribute — a declared payTo, an observed title, or observed inflow — rank first, and each r…

paid API x402
$0.33 · 30d 44 tx
agentproof-murex.vercel.app agentproof-murex.vercel.app
q 65

JSON repair for AI agents - fix malformed JSON and return structured output.

paid API x402
$0.01 · 30d 9 tx
api.carbon-cashmere.de api.carbon-cashmere.de
q 65

Curated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.

paid API x402
$1.07 · 30d 39 tx
slug.openverbs.com slug.openverbs.com
q 65

Convert text into a URL-safe slug: transliterate accents, apply a locale character map, and join with a separator.

paid API x402
$19.91 · 30d 1,387 tx